Optical constants

Refractive index of (CF₃CO)₂O (Trifluoroacetic anhydride, TFAA)

Chang et al. 2024: n 0.4–2.0 µm

Data: formula 1
Range: 0.4–2 µm
Temperature: 295 K
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.26945
Extinction coefficient k: 0

Permittivity ε₁: 1.6115
Permittivity ε₂: 0

Absorption coefficient α: 0 cm⁻¹
Penetration depth δ = λ/(2πk): — nm

Abbe number V_d: 56.833
Chromatic dispersion dn/dλ: -0.0243005 µm⁻¹

Group index n_g: 1.28373
Group velocity dispersion: 46.1683 fs²/mm

Dispersion parameter D: -251.873 ps/(nm·km)
Photon energy: 2.11001 eV

ε = (n + ik)², α = 4πk/λ, n_g = n − λ dn/dλ, GVD = λ³/(2πc²) d²n/dλ², D = −(λ/c) d²n/dλ². Group-velocity dispersion is given for formula data only.

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith

import lightsmith as ls

# (CF3CO)2O (Trifluoroacetic anhydride, TFAA): Chang et al. 2024: n 0.4–2.0 µm
mat = ls.fetch_refractiveindex("organic", "trifluoroacetic_anhydride", "Chang", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(mat.range_nm)  # (400, 2000) nm
eps = mat.eps([633])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_3ed106b3e737/lightsmith"
mat = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(mat.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (trifluoroacetic-anhydride/chang-2024).

# ... load mat as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=mat)],
    medium_index=1.0,
    wavelengths=ls.WavelengthRange(start_nm=400, stop_nm=1000, num=81),
)
res = ls.solve(sim)  # exact Mie for a sphere
print(res.q_ext)     # extinction efficiency at each wavelength

Same spec runs with DDA, FDTD, BEM or T-matrix: ls.compare(sim, ["mie", "dda"]).

import json, urllib.request
import lightsmith as ls

url = "https://materials.lightsmith.dev/v1/datasets/ds_3ed106b3e737/lightsmith?model=drude_lorentz"
mat_dl = ls.DrudeLorentz.model_validate(json.load(urllib.request.urlopen(url)))

A dispersive Drude–Lorentz model for time-domain solvers.

Materials guide Open a sphere of it in Studio Quick start Ask the community

Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

Dispersion formula

Sellmeier (formula 1), λ in µm

n^{2} - 1 = \frac{0.5939 λ^{2}}{λ^{2} - {0.0997}^{2}}

Valid from 0.4 to 2.0 µm.

Coefficients as stored

C_i	Value
C1	0.0
C2	0.5939
C3	0.0997

Comments and conditions

21.5–22.0 °C.

Conditions

temperature: 295 K

References

H.-J. Chang, N. Munera, C. Lopez-Zelaya, D. Banerjee, G. Beadie, E. W. Van Stryland, D. J. Hagan. Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry. Opt. Mater. Express 14, 1253–1267 (2024)

doi:10.1364/ome.519907 Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry, Optical Materials Express (2024)

Cite

Hao-Jung Chang et al.. Refractive index measurements of liquids from 0.5 to 2 µm using Rayleigh interferometry. Optical Materials Express, 14, 1253 (2024), doi:10.1364/ome.519907; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 400 wavelengths, the same grid as the API and the library

CSV comma separated TXT tab separated YAML n, k Full database record original YAML All quantities CSV JSON metadata

(CF3CO)2O (Trifluoroacetic anhydride, TFAA), Chang et al. 2024: n 0.4–2.0 µm: n and k versus wavelength
λ (µm)	n
0.4	1.277983
0.401617	1.277851
0.40324	1.277721
0.40487	1.277591
0.406506	1.277463
0.408149	1.277336
0.409799	1.27721
0.411455	1.277085
0.413118	1.276961
0.414788	1.276838
0.416465	1.276717
0.418148	1.276596
0.419838	1.276477
0.421535	1.276359
0.423239	1.276241
0.424949	1.276125
0.426667	1.27601
0.428391	1.275896
0.430123	1.275783
0.431861	1.27567
0.433607	1.275559
0.435359	1.275449
0.437119	1.27534
0.438886	1.275232
0.44066	1.275124
0.442441	1.275018
0.444229	1.274912
0.446024	1.274808
0.447827	1.274704
0.449637	1.274602
0.451455	1.2745
0.453279	1.274399
0.455111	1.274299
0.456951	1.2742
0.458798	1.274102
0.460652	1.274004
0.462514	1.273908
0.464383	1.273812
0.46626	1.273717
0.468145	1.273623
0.470037	1.27353
0.471937	1.273438
0.473844	1.273346
0.47576	1.273255
0.477683	1.273165
0.479613	1.273076
0.481552	1.272988
0.483498	1.2729
0.485452	1.272813
0.487414	1.272727
0.489385	1.272642
0.491363	1.272557
0.493349	1.272473
0.495343	1.27239
0.497345	1.272307
0.499355	1.272225
0.501373	1.272144
0.5034	1.272064
0.505434	1.271984
0.507477	1.271905
0.509528	1.271827
0.511588	1.271749
0.513655	1.271672
0.515732	1.271596
0.517816	1.27152
0.519909	1.271445
0.52201	1.271371
0.52412	1.271297
0.526239	1.271224
0.528366	1.271152
0.530501	1.27108
0.532645	1.271009
0.534798	1.270938
0.53696	1.270868
0.53913	1.270799
0.541309	1.27073
0.543497	1.270662
0.545694	1.270594
0.547899	1.270527
0.550114	1.27046
0.552337	1.270395
0.55457	1.270329
0.556811	1.270264
0.559062	1.2702
0.561321	1.270136
0.56359	1.270073
0.565868	1.270011
0.568155	1.269948
0.570452	1.269887
0.572757	1.269826
0.575072	1.269765
0.577397	1.269705
0.57973	1.269646
0.582073	1.269587
0.584426	1.269528
0.586788	1.26947
0.58916	1.269413
0.591541	1.269356
0.593932	1.269299
0.596333	1.269243
0.598743	1.269188
0.601163	1.269132
0.603593	1.269078
0.606032	1.269024
0.608482	1.26897
0.610941	1.268916
0.613411	1.268864
0.61589	1.268811
0.618379	1.268759
0.620879	1.268708
0.623388	1.268657
0.625908	1.268606
0.628438	1.268556
0.630978	1.268506
0.633528	1.268457
0.636088	1.268408
0.638659	1.268359
0.641241	1.268311
0.643833	1.268263
0.646435	1.268216
0.649048	1.268169
0.651671	1.268122
0.654305	1.268076
0.656949	1.26803
0.659605	1.267985
0.662271	1.26794
0.664948	1.267895
0.667635	1.267851
0.670334	1.267807
0.673043	1.267764
0.675763	1.26772
0.678495	1.267678
0.681237	1.267635
0.68399	1.267593
0.686755	1.267551
0.689531	1.26751
0.692318	1.267469
0.695116	1.267428
0.697925	1.267388
0.700746	1.267348
0.703579	1.267308
0.706422	1.267269
0.709278	1.26723
0.712144	1.267191
0.715023	1.267153
0.717913	1.267115
0.720814	1.267077
0.723728	1.267039
0.726653	1.267002
0.72959	1.266965
0.732539	1.266929
0.7355	1.266893
0.738472	1.266857
0.741457	1.266821
0.744454	1.266786
0.747463	1.266751
0.750484	1.266716
0.753517	1.266682
0.756563	1.266648
0.759621	1.266614
0.762691	1.26658
0.765774	1.266547
0.768869	1.266514
0.771977	1.266481
0.775097	1.266448
0.77823	1.266416
0.781375	1.266384
0.784533	1.266353
0.787704	1.266321
0.790888	1.26629
0.794085	1.266259
0.797294	1.266228
0.800517	1.266198
0.803752	1.266168
0.807001	1.266138
0.810263	1.266108
0.813538	1.266079
0.816826	1.26605
0.820127	1.266021
0.823442	1.265992
0.82677	1.265964
0.830112	1.265935
0.833467	1.265907
0.836836	1.26588
0.840218	1.265852
0.843614	1.265825
0.847024	1.265798
0.850447	1.265771
0.853885	1.265744
0.857336	1.265718
0.860801	1.265692
0.86428	1.265666
0.867774	1.26564
0.871281	1.265614
0.874803	1.265589
0.878338	1.265564
0.881888	1.265539
0.885453	1.265514
0.889032	1.26549
0.892625	1.265465
0.896233	1.265441
0.899855	1.265417
0.903492	1.265394
0.907144	1.26537
0.910811	1.265347
0.914492	1.265324
0.918188	1.265301
0.921899	1.265278
0.925626	1.265255
0.929367	1.265233
0.933123	1.265211
0.936895	1.265189
0.940681	1.265167
0.944483	1.265145
0.948301	1.265124
0.952134	1.265102
0.955982	1.265081
0.959846	1.26506
0.963726	1.26504
0.967621	1.265019
0.971532	1.264998
0.975458	1.264978
0.979401	1.264958
0.98336	1.264938
0.987334	1.264918
0.991325	1.264899
0.995332	1.264879
0.999355	1.26486
1.00339	1.264841
1.00745	1.264822
1.01152	1.264803
1.01561	1.264784
1.01971	1.264766
1.02384	1.264747
1.02797	1.264729
1.03213	1.264711
1.0363	1.264693
1.04049	1.264675
1.04469	1.264658
1.04892	1.26464
1.05316	1.264623
1.05741	1.264606
1.06169	1.264588
1.06598	1.264572
1.07029	1.264555
1.07461	1.264538
1.07896	1.264522
1.08332	1.264505
1.0877	1.264489
1.09209	1.264473
1.09651	1.264457
1.10094	1.264441
1.10539	1.264425
1.10986	1.26441
1.11434	1.264394
1.11885	1.264379
1.12337	1.264364
1.12791	1.264348
1.13247	1.264333
1.13704	1.264319
1.14164	1.264304
1.14625	1.264289
1.15089	1.264275
1.15554	1.26426
1.16021	1.264246
1.1649	1.264232
1.16961	1.264218
1.17433	1.264204
1.17908	1.26419
1.18385	1.264177
1.18863	1.264163
1.19344	1.264149
1.19826	1.264136
1.2031	1.264123
1.20797	1.26411
1.21285	1.264097
1.21775	1.264084
1.22267	1.264071
1.22761	1.264058
1.23258	1.264046
1.23756	1.264033
1.24256	1.264021
1.24758	1.264008
1.25262	1.263996
1.25769	1.263984
1.26277	1.263972
1.26787	1.26396
1.273	1.263948
1.27814	1.263937
1.28331	1.263925
1.2885	1.263913
1.2937	1.263902
1.29893	1.263891
1.30418	1.263879
1.30945	1.263868
1.31475	1.263857
1.32006	1.263846
1.3254	1.263835
1.33075	1.263825
1.33613	1.263814
1.34153	1.263803
1.34696	1.263793
1.3524	1.263782
1.35787	1.263772
1.36335	1.263761
1.36886	1.263751
1.3744	1.263741
1.37995	1.263731
1.38553	1.263721
1.39113	1.263711
1.39675	1.263701
1.4024	1.263692
1.40807	1.263682
1.41376	1.263673
1.41947	1.263663
1.42521	1.263654
1.43097	1.263644
1.43675	1.263635
1.44256	1.263626
1.44839	1.263617
1.45424	1.263608
1.46012	1.263599
1.46602	1.26359
1.47195	1.263581
1.4779	1.263572
1.48387	1.263564
1.48987	1.263555
1.49589	1.263547
1.50194	1.263538
1.50801	1.26353
1.5141	1.263521
1.52022	1.263513
1.52637	1.263505
1.53254	1.263497
1.53873	1.263489
1.54495	1.263481
1.55119	1.263473
1.55746	1.263465
1.56376	1.263457
1.57008	1.263449
1.57643	1.263442
1.5828	1.263434
1.58919	1.263427
1.59562	1.263419
1.60207	1.263412
1.60854	1.263404
1.61504	1.263397
1.62157	1.26339
1.62813	1.263383
1.63471	1.263375
1.64131	1.263368
1.64795	1.263361
1.65461	1.263354
1.6613	1.263347
1.66801	1.263341
1.67475	1.263334
1.68152	1.263327
1.68832	1.26332
1.69514	1.263314
1.70199	1.263307
1.70887	1.263301
1.71578	1.263294
1.72271	1.263288
1.72968	1.263281
1.73667	1.263275
1.74369	1.263269
1.75074	1.263263
1.75781	1.263256
1.76492	1.26325
1.77205	1.263244
1.77921	1.263238
1.7864	1.263232
1.79362	1.263226
1.80087	1.26322
1.80815	1.263215
1.81546	1.263209
1.8228	1.263203
1.83017	1.263197
1.83756	1.263192
1.84499	1.263186
1.85245	1.263181
1.85993	1.263175
1.86745	1.26317
1.875	1.263164
1.88258	1.263159
1.89019	1.263154
1.89783	1.263148
1.9055	1.263143
1.9132	1.263138
1.92093	1.263133
1.9287	1.263128
1.93649	1.263122
1.94432	1.263117
1.95218	1.263112
1.96007	1.263108
1.96799	1.263103
1.97594	1.263098
1.98393	1.263093
1.99195	1.263088
2	1.263083

Optical transmission calculator

Free-standing sample in vacuum, normal incidence

Transmittance T: —
Reflectance R: —

Fresnel reflection calculator

R_p: —
R_s: —
R = (R_p+R_s)/2: —
Phase φ_p: —
Phase φ_s: —
Brewster angle θ_B: —
Critical angle θ_C: —

(CF₃CO)₂O (Trifluoroacetic anhydride, TFAA): all datasets

Chang et al. 2024: n 0.4–2.0 µm n 0.4–2 µm default

About (CF3CO)2O (Trifluoroacetic anhydride, TFAA)

Trifluoroacetic anhydride ((CF₃CO)₂O) is a powerful acylating agent used extensively in organic synthesis to introduce trifluoroacetyl groups into various substrates. This compound is a colorless, highly reactive liquid with a strong, pungent odor. It is especially valuable in peptide synthesis and other sensitive chemical processes where its reactivity and volatility facilitate the formation and manipulation of complex molecules. While Trifluoroacetic anhydride is not primarily recognized for its optical properties, its potential for use in specific scientific analyses involving fluorinated compounds could be considered in specialized settings.

More about (CF3CO)2O (Trifluoroacetic anhydride, TFAA) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C4F6O3 - trifluoroacetic anhydride/nk/Chang.yml
ID: ds_3ed106b3e737
API: /v1/datasets/ds_3ed106b3e737

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