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luminol.py
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luminol.py
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from chanim import *
from pathlib import Path
LUMINOL = "*6(-=*6(-(=O)-N(-H)-N(-H)-(=O)--)-=(-NH_2)-=)"
DIANION_1 = "*6(-=*6(-(=O)-\\charge{45:2pt=$\\scriptstyle-$}{N}-\\charge{45:2pt=$\\scriptstyle-$}{N}-(=O)--)-=(-NH_2)-=)"
O2 = "O(=[-2]O)"
endoperoxide = None
## Custom Mobjects ##
class JablonskiDiagram(VGroup):
def __init__(self, label, num_vibs, **kwargs):
self.ground_state = Line(stroke_width=3)
self.vibs = VGroup(*[Line(stroke_width=0.5) for i in range(num_vibs)]).arrange(
UP
)
super().__init__(self.ground_state, self.vibs, **kwargs)
self.arrange(UP)
self.label = MathTex(label).next_to(self.ground_state, LEFT)
self.add(self.label)
class WigglyArrow(TipableVMobject):
def __init__(
self,
num_wiggles=4,
amplitude=0.5,
wiggle_radius=0.5,
final_line_length=0.5,
**kwargs,
):
self.num_wiggles = num_wiggles
self.amplitude = amplitude
self.wiggle_radius = wiggle_radius
self.final_line_length = final_line_length
super().__init__(**kwargs)
self.add_tip()
def generate_points(self):
new_points = [
((-1) ** (x // 2)) * self.amplitude * UP + self.wiggle_radius * x * RIGHT
if (x % 2 != 0)
else ORIGIN
if x == 0
else self.wiggle_radius * x * RIGHT
for x in range(2 * self.num_wiggles + 1)
]
self.set_points_smoothly(new_points)
final_point = new_points[-1] + self.final_line_length * RIGHT
self.add_line_to(final_point)
self.center()
## Scenes ##
class MechanismScene(Scene):
def setup(self):
self.divider = Line(
start=config["frame_y_radius"] * DOWN,
end=config["frame_y_radius"] * UP,
).shift(RIGHT * 1.75)
self.steps_header = (
Text("Steps").next_to(self.divider).set_y(config["frame_y_radius"] - 1.5)
)
self.play(Create(self.divider), Write(self.steps_header))
def add_steps(
self,
*steps,
animation=Write,
buff_factor=0.25,
scale_factor=0.8,
extra_methods: str = None,
animate=True,
**bulleted_list_kwargs,
):
self.steps = (
BulletedList(*steps, **bulleted_list_kwargs)
.next_to(self.steps_header, DOWN, buff=buff_factor)
.shift(1.75 * RIGHT)
.scale(scale_factor)
)
## This could be pretty handy.
exec(f"self.steps.{extra_methods}")
if animate:
self.play(animation(self.steps))
else:
self.add(self.steps)
class ChemObjectTest(Scene):
def construct(self):
luminol = ChemObject("*6(-=*6(-(=O)-NH-NH-(=O)--)-=(-NH_2)-=)")
self.play(Write(luminol))
class ChemReactionTest(Scene):
def construct(self):
react = Reaction(
["*6(-=*6(-(=O)-NH-NH-(=O)--)-=(-NH_2)-=)"],
[
"*6(-=*6(-(=O)-\\charge{45:2pt=$\\scriptstyle-$}{N}-\\charge{45:2pt=$\\scriptstyle-$}{N}-(=O)--)-=(-NH_2)-=)"
],
arrow_type="eq",
)
self.play(react.show(reactant_product_simultaneity=True))
class LuminolIntro(Scene):
def construct(self):
word = Text("Chemiluminesence").scale(2).center()
self.play(
Write(word),
# get_submobject_index_labels(word)
)
self.wait(1.75)
brace1 = BraceText(word[0:5], "``chemical''", brace_direction=UP)
brace2 = BraceText(word[5:], "``light''", brace_direction=DOWN)
self.play(brace2.creation_anim(), Wait(), word[5:].animate.set_color(BLUE))
self.play(brace1.creation_anim(), Wait(), word[0:5].animate.set_color(RED))
self.wait(2)
self.clear()
self.show_examples()
luminol = ChemWithName(
LUMINOL,
"Luminol\\\\\\footnotesize (5-Amino-2,3-dihydrophthalazine-1,4-dione)",
).shift(UP)
self.play(luminol.creation_anim())
self.wait(2)
self.play(
FadeOut(luminol.name, shift=DOWN),
luminol.chem.animate.shift(DOWN + 4 * LEFT),
)
# luminol_para = Paragraph(
# "Used in forensics", "to locate blood traces", "at crime scenes"
# ).to_edge(RIGHT)
luminol_profile = MoleculeProfile(
"Luminol", "3-aminophthalazide", "Forensics, Biology", 1902
)
self.play(luminol_profile.creation_anim())
self.wait()
def show_examples(self):
luciferin_bio_photo = ImageMobject(Path(".\\references\\firefly_glowing.jpg"))
luceferin_text = Tex("Fireflies\\\\(luciferin)")
luceferin_group = (
Group(luciferin_bio_photo, luceferin_text).arrange(DOWN).to_edge(LEFT)
)
glow_stick_photo = ImageMobject(Path(".\\references\\glow_stick.jpg"))
glow_stick_text = Tex("Glow sticks\\\\(Cyalume)")
glow_stick_group = (
Group(glow_stick_photo, glow_stick_text).arrange(DOWN).to_edge(RIGHT)
)
self.play(
FadeIn(luceferin_group[0], shift=DOWN),
FadeIn(luceferin_group[1], shift=UP),
)
self.wait()
self.play(
FadeIn(glow_stick_group[0], DOWN),
FadeIn(glow_stick_group[1], UP),
)
self.wait()
self.play(
FadeOut(luceferin_group, shift=DOWN),
FadeOut(glow_stick_group, shift=DOWN),
)
## NOTE: Write doesn't seem to work with this. Use creation_anim instead.
class MoleculeProfile(VGroup):
def __init__(
self, name: str, iupac_name: str, uses: str, first_synthesis: int, **kwargs
):
self.name = name
self.iupac_name = iupac_name
self.uses = uses
self.first_synthesis = first_synthesis
self.title = Text("Molecule Profile").add_background_rectangle(
opacity=1
) # heh heh, they'll never know...
dummy_underline = Underline(self.title)
self.divider = Line(
# dummy_underline.get_center(),
# dummy_underline.get_center()
# + (dummy_underline.get_y() + config["frame_y_radius"]) * DOWN,
config["frame_y_radius"] * UP * 0.6,
config["frame_y_radius"] * DOWN * 0.6,
)
# self.fields = (
# VGroup(
# Tex("Name"),
# Tex("IUPAC Name"),
# Tex("Used in"),
# Tex("First synthesis"),
# )
# .arrange(DOWN, buff=1)
# .align_to(UP)
# )
self.fields = Paragraph(
"Name\n\n",
# "IUPAC Name\n",
"Used in\n",
"First synthesis\n",
line_spacing=2,
size=0.65,
font="Syne",
)
self.values = Paragraph(
self.name,
f"({self.iupac_name})" + "\n",
self.uses + "\n",
str(self.first_synthesis) + "\n",
# line_spacing = 100, yup this is broken ig
size=0.65,
)
# self.values = (
# VGroup(
# Tex(self.name),
# Tex(self.iupac_name),
# Tex(self.uses),
# Tex(str(self.first_synthesis)),
# )
# .arrange(DOWN, buff=1)
# .align_on_border(UP)
# )
bounding_lines = VGroup(Line())
real_underline = Line(2 * LEFT, 2 * RIGHT)
content = (
VGroup(
self.fields,
self.divider,
self.values
# VGroup(self.fields, self.values).arrange(buff=1)
)
.arrange()
.center()
)
super().__init__(
self.title,
# real_underline,
content,
**kwargs,
)
# self.divider.shift(DOWN)
self.arrange(DOWN, buff=0.25)
content.shift(RIGHT)
self.to_edge(RIGHT)
self.title.shift(RIGHT / 2)
self.add_underline()
def add_underline(self):
self.underline = underline = Underline(self.title, buff=MED_SMALL_BUFF)
self.add(underline)
def creation_anim(self):
title_anim = FadeIn(self.title)
field_anims = [FadeIn(line,shift=UP) for line in self.fields.chars]
value_anims = [FadeIn(line,shift=UP) for line in self.values.chars]
divider_anim = FadeIn(self.divider)
underline_anim = DrawBorderThenFill(self.underline)
console.print("Hi! From line 281")
return AnimationGroup(
title_anim,
divider_anim,
underline_anim,
*field_anims,
*value_anims,
)
class MoleculeProfileTest(Scene):
def construct(self):
profile = MoleculeProfile(
"Luminol", "3-aminophthalazide", "Forensics, biology", 1938
)
self.play(profile.creation_anim())
self.wait()
class Synthesis(Scene):
def setup(self):
self.divider = Line(
start=config["frame_y_radius"] * DOWN,
end=config["frame_y_radius"] * UP,
).shift(RIGHT * 1.75)
self.steps_header = (
Text("Steps").next_to(self.divider).set_y(config["frame_y_radius"] - 1.5)
)
self.play(Create(self.divider), Write(self.steps_header))
def construct(self):
self.steps = (
BulletedList(
"Heat 3-nitrophthalic\\\\acid with hydrazine\\\\in glycerol",
"Reduce nitro group to\\\\amino group using\\\\sodium dithionite",
tex_environment="flushleft",
)
.next_to(self.steps_header, DOWN, buff=1.25)
.shift(1.75 * RIGHT)
)
self.play(Write(self.steps))
self.play(
self.steps.animate.fade_all_but(0),
)
self.wait()
## Note: bond angles totally not accurate. required for demonstration and transtition purposes.
npa = ChemObject(
"*6(-=(-(=[-2]O)-[:30]O(-[-2]H))-(-(=[2]O)-[:-30]O(-[2]H))=(-NO_2)-=)"
).set_x(-1.5 * self.divider.get_x())
self.play(Write(npa))
hydrazine = (
ChemObject("N(-[3]H)(-[-3]H)-N(-[1]H)(-[-1]H)")
.move_to(npa)
.shift(2 * RIGHT)
.scale(0.85)
)
self.play(
npa.animate.shift(LEFT * 2),
Write(hydrazine),
)
self.play(
Rotate(hydrazine, angle=TAU / 4, run_time=0.5),
)
self.play(hydrazine.animate.shift(LEFT))
self.play(
Rotate(hydrazine[0][0], -PI / 2),
Rotate(hydrazine[0][1], -PI / 2),
Rotate(hydrazine[0][3], -PI / 2),
Rotate(hydrazine[0][5], -PI / 2),
Rotate(hydrazine[0][7], -PI / 2),
Rotate(hydrazine[0][9], -PI / 2),
Transform(
hydrazine[0][8], hydrazine[0][10].copy().scale(1.25).shift(LEFT * 1.25)
),
Transform(
hydrazine[0][2], hydrazine[0][4].copy().scale(1.25).shift(LEFT * 1.25)
),
)
self.wait(2)
water_grp_1 = VGroup(
npa[0][16],
npa[0][18],
npa[0][19],
hydrazine[0][7],
hydrazine[0][8],
)
water_grp_2 = VGroup(
npa[0][7],
npa[0][9],
npa[0][10],
hydrazine[0][1],
hydrazine[0][2],
)
self.play(FadeOut(water_grp_1, shift=UP), FadeOut(water_grp_2, shift=DOWN))
hydrazine = VGroup(
hydrazine[0][0],
hydrazine[0][3],
hydrazine[0][4],
hydrazine[0][5],
hydrazine[0][6],
hydrazine[0][9],
hydrazine[0][10],
)
self.play(hydrazine.animate.shift(LEFT * 1.5))
self.wait()
sodium_thiocyanide = ChemObject("Na_2 S_2 O_4")
self.play(self.steps.animate.fade_all_but(1), Write(sodium_thiocyanide))
footnote = (
Tex(
"* I'm not animating the reduction, just assume sodium thiocyanide is a reducing agent\\\\and it's reduced the nitro group",
tex_environment="flushleft",
)
.scale(0.4)
.to_corner()
)
self.play(npa[0][23].animate.set_color(YELLOW))
hydrogen = ChemObject("H").set_color(RED).move_to(npa[0][23])
self.wait(2)
self.play(
FadeOut(npa[0][23], shift=UP), FadeIn(hydrogen,shift=UP), Write(footnote)
)
self.wait()
self.play(
FadeOut(sodium_thiocyanide,shift=DOWN),
FadeOut(footnote,shift=DOWN),
hydrogen.animate.set_color(WHITE),
)
luminol_created = VGroup(
npa[0][0:7],
npa[0][8],
npa[0][11:16],
npa[0][17],
npa[0][20:23],
npa[0][24:],
hydrogen,
hydrazine,
)
self.play(
luminol_created.animate.shift(RIGHT * 2),
)
luminol_label = Tex("Luminol").to_edge(DOWN).shift(2.5 * LEFT + UP * 0.5)
self.play(Write(luminol_label))
self.wait()
self.play(
Uncreate(self.divider),
FadeOut(VGroup(self.steps, self.steps_header)),
VGroup(luminol_created, luminol_label).center,
)
self.add(
index_labels(hydrazine[0]),
index_labels(npa[0]),
)
class BasicForensicCaseOutline(Scene):
"""
This friggin scene took me over half an hour to debug all because of ONE FUCKING STRAY BRACE.
"""
def construct(self):
react = Reaction(
["Luminol"],
["Blue light", "other stuff"],
arrow_length=2,
arrow_text_up="\\chemfig{Blood}",
arrow_text_down="\\chemfig{H_2O_2} \\+ \\chemfig{H_2O}",
)
react.set_color_by_tex("Blue light", BLUE)
self.play(react.show(reactant_product_simultaneity=True), rate_func=rush_into)
self.wait(2)
class LuminolReactionMechanism(MechanismScene):
steps_list = [
"Deprotonation (removal\\\\of hydrogen) and\\\\dianion formation",
"Rearrangement of charges\\\\(tautomerisation)",
"Liberation of $\\text{N}_2$\\\\and formation of\\\\unstable 3-APA (3-APA*)",
"Release of photon\\\\emitting blue light",
]
def construct(self):
global endoperoxide # needed for reasoning scene
self.add_steps(
*self.steps_list,
extra_methods="shift(UP*0.65)",
)
self.luminol = ChemWithName(LUMINOL, "Luminol").shift(LEFT * 3)
self.hydroxide_1 = ChemObject("-OH").next_to(self.steps_header, LEFT, buff=0.75)
self.hydroxide_2 = ChemObject("-OH").next_to(self.hydroxide_1, DOWN, buff=4.5)
self.play(self.luminol.creation_anim())
self.wait()
self.step1()
self.step2()
self.step3()
self.step4()
def step1(self):
## Step 1 start
self.play(self.steps.animate.fade_all_but(0))
self.play(
FadeIn(self.hydroxide_1, DOWN),
FadeIn(self.hydroxide_2, UP),
)
self.play(
ApplyMethod(
self.hydroxide_1.next_to,
self.luminol.chem[0][13],
dict(buff=SMALL_BUFF),
),
ApplyMethod(
self.hydroxide_2.next_to, self.luminol.chem[0][9], dict(buff=SMALL_BUFF)
),
)
water_group_1 = VGroup(self.luminol.chem[0][13], self.hydroxide_1)
water_group_2 = VGroup(self.luminol.chem[0][9], self.hydroxide_2)
self.play(
Transform(water_group_1, ChemObject("H_2 O").move_to(water_group_1)),
Transform(water_group_2, ChemObject("H_2 O").move_to(water_group_2)),
)
self.play(
Transform(
self.luminol.chem[0][14],
MathTex("\\scriptstyle-").move_to(self.luminol.chem[0][14]),
),
Transform(
self.luminol.chem[0][10],
MathTex("\\scriptstyle-")
.move_to(self.luminol.chem[0][10])
.shift(UP * 0.5),
),
FadeOut(self.luminol.name, shift=DOWN),
FadeOut(water_group_1, shift=UP),
FadeOut(water_group_2, shift=DOWN),
)
## Step 1 end
def step2(self):
self.wait(2)
## Step 2 start
self.play(self.steps.animate.fade_all_but(1))
self.play(
Transform(
self.luminol.chem[0][14],
self.luminol.chem[0][15].copy().scale(0.8).shift(DOWN * 0.1),
),
Transform(
self.luminol.chem[0][10],
self.luminol.chem[0][8].copy().scale(0.8).shift(UP * 0.1),
),
Transform(
self.luminol.chem[0][18],
MathTex("\\scriptstyle-").next_to(
self.luminol.chem[0][16], UR + UP, buff=0.1
),
),
Transform(
self.luminol.chem[0][5],
MathTex("\\scriptstyle-").next_to(
self.luminol.chem[0][4], UR + UP, buff=0.1
),
),
self.luminol.chem[0][17].animate.shift(0.05 * RIGHT),
self.luminol.chem[0][6].animate.shift(0.05 * RIGHT),
# self.luminol.chem[0][14].next_to,self.luminol.chem[0][15],DL,dict(buff=0.15)
)
## Step 2 end
def step3(self):
## Step 3 start
global endoperoxide
self.play(self.steps.animate.fade_all_but(2))
self.o2 = ChemObject(O2).next_to(self.luminol.chem, buff=0.75)
self.o2.scale(0.75)
self.play(Write(self.o2))
self.play(
MoveAlongPath(
self.o2[0][2],
ArcBetweenPoints(
self.o2[0][2].get_center(),
self.o2[0][2].get_center() + UP * 0.75 + 0.05 * LEFT,
),
),
self.o2[0][3].animate.shift(RIGHT * 0.05),
)
self.play(
self.o2.animate.next_to(self.luminol.chem[0][16], DOWN, buff=0.8),
Transform(
self.luminol.chem[0][14],
self.luminol.chem[0][12].copy().shift(0.1 * LEFT),
),
Transform(
self.luminol.chem[0][10],
## This is totally not a weird workaround...
self.o2[0][3]
.copy()
.scale(1.5)
.next_to(self.luminol.chem[0][4], UP, buff=0.85),
),
)
# self.add(
# get_submobject_index_labels(self.luminol.chem[0]).set_color(BLUE),
# get_submobject_index_labels(self.o2[0]).set_color(RED),
# )
## To be used in ReasonsBehindChemiluminescence
endoperoxide = VGroup(
self.luminol.chem[0][0:9].copy(),
self.luminol.chem[0][10:13].copy(),
self.luminol.chem[0][14:].copy(),
self.o2[0][:].copy(),
)
self.wait()
self.play(
Transform(
self.luminol.chem[0][8],
self.luminol.chem[0][12].copy().shift(0.1 * RIGHT),
),
Transform(
self.o2[0][3],
MathTex("\\scriptstyle-").move_to(self.o2[0][1]).shift(UR * 0.25),
),
Transform(
self.luminol.chem[0][15],
MathTex("\\scriptstyle-").move_to(self.o2[0][0]).shift(UR * 0.25),
),
Transform(
self.luminol.chem[0][5],
self.luminol.chem[0][6].copy().shift(0.05 * RIGHT),
),
Transform(
self.luminol.chem[0][18],
self.luminol.chem[0][17].copy().shift(0.05 * RIGHT),
),
self.luminol.chem[0][6].animate.shift(0.05 * LEFT),
self.luminol.chem[0][17].animate.shift(0.05 * LEFT),
)
self.wait(2.5)
n2 = VGroup(
self.luminol.chem[0][7],
self.luminol.chem[0][8],
self.luminol.chem[0][11],
self.luminol.chem[0][12],
self.luminol.chem[0][14],
)
## Updaters because rotating multiple things simultaneously in manim can be a PITA at times.
self.o2[0][0].add_updater(
lambda m: m.next_to(self.o2[0][2].get_end(), DOWN, buff=0.1)
)
self.luminol.chem[0][15].add_updater(
lambda m: m.move_to(self.o2[0][0]).shift(UR * 0.25)
)
self.o2[0][1].add_updater(
lambda m: m.next_to(self.o2[0][0], DOWN, buff=0.3)
) ## because when you can't update up, you gotta look down.
self.o2[0][3].add_updater(lambda m: m.move_to(self.o2[0][1]).shift(UR * 0.25))
self.play(
n2.animate.shift(2 * RIGHT),
Transform(
self.o2[0][2],
self.luminol.chem[0][0].copy().shift(RIGHT * 2.55 + UP * 1.5),
),
Transform(
self.luminol.chem[0][10],
self.luminol.chem[0][28].copy().shift(RIGHT * 2.55 + DOWN * 1.5),
),
)
self.three_APA = ChemWithName(
ComplexChemIon(
"*6(-=(-(=[-2]O)-[:36]\\charge{45:2pt=$\\scriptstyle-$}{O})-(-(=[2]O)-[:-36]\\charge{45:2pt=$\\scriptstyle-$}{O})=(-NH_2)-=)",
charge="*",
).scale(0.75),
"3-Aminophthalamine* (3-APA*)",
).shift(LEFT * 4.5)
self.three_APA.name.scale(0.75).shift(UP * 0.5)
self.three_APA.chem[0][45:].shift(RIGHT * 0.2)
self.o2[0][0].clear_updaters()
self.o2[0][1].clear_updaters()
self.o2[0][3].clear_updaters()
self.luminol.chem[0][15].clear_updaters()
self.play(
ReplacementTransform(
VGroup(
## Yeah, yeah I know I should be using a slice here and not individual elements like a caveman.
## Except the previous times I've tried to be lazy and do that the results were less than stellar.
self.luminol.chem[0][0],
self.luminol.chem[0][1],
self.luminol.chem[0][2],
self.luminol.chem[0][3],
self.luminol.chem[0][4],
self.luminol.chem[0][5],
self.luminol.chem[0][6],
self.luminol.chem[0][10],
self.luminol.chem[0][15],
self.luminol.chem[0][16],
self.luminol.chem[0][17],
self.luminol.chem[0][18],
self.luminol.chem[0][19],
self.luminol.chem[0][20],
self.luminol.chem[0][21],
self.luminol.chem[0][22],
self.luminol.chem[0][23],
self.luminol.chem[0][24],
self.luminol.chem[0][25],
self.luminol.chem[0][26],
self.luminol.chem[0][27],
self.luminol.chem[0][28],
self.luminol.chem[0][29],
self.luminol.chem[0][30],
self.o2[0][0],
self.o2[0][1],
self.o2[0][2],
self.o2[0][3],
),
self.three_APA.chem,
),
FadeIn(self.three_APA.name,shift=UP),
)
## Step 3 end
def step4(self):
## Step 4 start
self.play(self.steps.animate.fade_all_but(3))
light = Tex("h$\\nu$").center().shift(LEFT * 1.5)
light_boundary = AnimatedBoundary(
light, colors=[BLUE_A, BLUE_B, BLUE_C, BLUE_D], cycle_rate=2
)
self.wait()
self.play(
FadeOut(
VGroup(
self.three_APA.chem[0][0:18],
self.three_APA.chem[0][45:63],
self.three_APA.name,
), shift=DOWN
),
# self.three_APA.chem[0][18:45].animate.shift(LEFT * 2.5),
ReplacementTransform(self.three_APA.chem[0][63], light),
)
self.add(light_boundary)
self.wait(3)
# self.play(
# # FadeOutAndShift(VGroup(self.three_APA.chem[0][18:45], n2)),
# # ApplyFunction(lambda m: m.scale(2.5).shift(LEFT * 4), light),
# ApplyFunction(
# lambda m: m.scale(0.6).shift(LEFT * 3),
# VGroup(self.three_APA.chem[0][18:45], n2, light),
# ),
# )
self.play(
# Write(
# DashedLine(
# start=config["frame_y_radius"] * DOWN,
# end=config["frame_y_radius"] * UP,
# )
# .next_to(n2, buff=1)
# .set_opacity(0.65),
# run_time=0.5,
# ),
FadeIn(
ImageMobject(Path(".\\references\luminol_light.jpg"))
.to_edge(RIGHT)
.shift(RIGHT),shift=UP
# .next_to(light, buff=2)
# .scale(0.8)
),
)
self.wait(5)
## Step 4 end
self.clear()
## Debug Stuff
# self.add(get_submobject_index_labels(self.three_APA.chem[0]))
# self.add(get_submobject_index_labels(self.o2[0]))
# self.add(get_submobject_index_labels(self.luminol.chem[0]))
class EnergyDiagramIntermission(Scene):
def construct(self):
title = Title("Jablonski Diagram", include_underline=True).shift(UP * 0.2)
self.play(Write(title))
s0, s1, t1 = self.get_jablonski_diagrams()
t1.label.next_to(t1.ground_state, RIGHT)
VGroup(s0, s1).arrange(UP, buff=2).shift(LEFT * 2)
t1.next_to(s1, 2 * RIGHT + DOWN * 0.5, buff=1).shift(UP * 1.5)
# self.add(s0, s1, t1)
trend_arrow = (
VGroup(Tex("Energy"), Arrow(start=2 * DOWN, end=2 * UP))
.arrange()
.to_edge(buff=1)
)
self.play(
Write(
VGroup(
trend_arrow[0],
s0,
s1,
t1,
)
),
FadeIn(trend_arrow[1],shift=UP),
)
vibrational_states_brace = BraceText(
s0.vibs, "Vibrational\\\\states", brace_direction=RIGHT
)
self.play(vibrational_states_brace.creation_anim())
self.play(FadeOut(vibrational_states_brace))
explanations = VGroup(
Text("(More excited\nsinglet state)")
.next_to(s1.ground_state, DOWN, buff=0)
.scale(0.5),
Text("(Unstable\ntriplet state)")
.next_to(t1.ground_state, DOWN, buff=0)
.scale(0.5),
Text("(Less excited\nsinglet state)")
.next_to(s0.ground_state, DOWN)
.scale(0.5),
)
self.play(Create(explanations))
self.wait()
self.play(Uncreate(explanations))
electron = MathTex("\\upharpoonleft").scale(2)
electron.move_to(t1.vibs[1]).set_color(RED)
self.play(Write(electron))
self.wait()
intersystem_crossing_arrow = WigglyArrow(10, 0.25, 0.15).put_start_and_end_on(
t1.ground_state.get_start(), s1.ground_state.get_end()
)
intersystem_crossing_label = BraceText(
intersystem_crossing_arrow, "Intersystem Crossing"
)
def update_rotate_and_shift(mob: Mobject):
# Rotate(mob)
mob.move_to(s1.vibs[1]).rotate(PI).flip() ## ehh, good enough
return mob
self.play(
Create(intersystem_crossing_arrow),
intersystem_crossing_label.creation_anim(),
)
self.wait()
self.play(FadeOut(intersystem_crossing_label,shift=DOWN))
self.play(
# Rotate(electron),
# ApplyFunction(update_rotate_and_shift, electron)
electron.animate.move_to(s1.vibs[1])
.rotate(PI)
.flip()
)
self.play(
electron.animate.move_to(s1.vibs[1]),
)
arrow_info_1 = (
VGroup(
Arrow(RIGHT, LEFT),
Text(
"More stable as\nmolecule is less\nreactive due to\nall orbitals being filled"
).scale(0.5),
)
.arrange()
.next_to(s1.vibs[1])
)
self.play(
FadeIn(arrow_info_1),
Wait(2),
)
photon = VGroup(Circle(BLUE, fill_opacity=0.8).scale(0.5), Tex("h$\\nu$"))
# photon.add(Tex("h$\\nu$").add_updater(lambda m, dt: m.move_to(photon)))
photon.next_to(s1.ground_state, DOWN * 1.5)
def some_updater(m: Mobject, dt):
m.shift(dt * (3 * RIGHT + 1 * DOWN))
# FadeIn(m)
return m
photon.add_updater(some_updater)
write_and_shift_photon = AnimationGroup(
Write(photon), ApplyMethod(photon.shift, 3 * RIGHT + 2 * DOWN)
)
# self.add(photon)
self.play(
electron.animate.move_to(s0.vibs[1]),
# arrow_info_1.next_to,s0.vibs[1],dict(buff=0.5),
FadeOut(arrow_info_1),
Show(photon),
# ApplyFunction(some_updater,photon)
# photon.shift,
# 3 * RIGHT + 2 * DOWN,
# FadeIn(photon),
# write_and_shift_photon
)
self.wait(2)
def get_jablonski_diagrams(self):
return [JablonskiDiagram(label, 5) for label in ["S_{0}", "S_{1}", "T_{1}"]]
class SomeDefinitions(Scene):
def construct(self):
head = Text("PAUSE for basic definitions").to_edge(UP, buff=1.5)
definitions = BulletedList(
"Triplet State - A molecule is said to be in a triplet state\\\\if there's at least one unpaired electron\\\\in its orbitals.",
"Singlet State - And a singlet state is one in which\\\\there're no unpaired electrons in its orbitals.",
).center()
self.add(head, definitions)
self.wait()
class Show(Write):
"""
Show a Mobject without animation.
"""
def get_bounds(self, alpha):
if alpha > 0:
alpha = 1
return (0, alpha)
class Show2(Create):
"""
Show a Mobject without animation.
"""
def get_bounds(self, alpha):
if alpha > 0:
alpha = 1
return (0, alpha)
class SynthesisVideoSuggestion(Scene):
def construct(self):
nilered_box, nurdrage_box = Rectangle(height=3, width=4), Rectangle(
height=3, width=4
)
nilered_text, nurdrage_text = Tex("NileRed"), Tex("NurdRage")
VGroup(
VGroup(nilered_box, nilered_text).arrange(DOWN, buff=0.5),
VGroup(nurdrage_box, nurdrage_text).arrange(DOWN, buff=0.5),
).arrange(RIGHT, buff=1.5)