Optical constants

Refractive index of C₃H₇NO (Dimethylformamide, DMF)

Li et al. 2022: n 0.215–1.7 µm

Data: formula 5
Range: 0.215–1.7 µm
Licence: CC0-1.0

Axis Log x Log y

Click the plot to set the calculator wavelength.

At one wavelength

Refractive index n: 1.43292
Extinction coefficient k: 0

Permittivity ε₁: 2.05325
Permittivity ε₂: 0

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

Abbe number V_d: 32.58
Chromatic dispersion dn/dλ: -0.070973 µm⁻¹

Group index n_g: 1.47462
Group velocity dispersion: 101.723 fs²/mm

Dispersion parameter D: -554.953 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

# C3H7NO (Dimethylformamide, DMF): Li et al. 2022: n 0.215–1.7 µm
c3h7no = ls.fetch_refractiveindex("organic", "dimethylformamide", "Li", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(c3h7no.range_nm)  # (215, 1700) nm
eps = c3h7no.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_cd3ccee7d6e7/lightsmith"
c3h7no = ls.Tabulated.model_validate(json.load(urllib.request.urlopen(url)))
print(c3h7no.source)  # citation and provenance travel with the data

Any dataset here, as the library's Tabulated material (dimethylformamide/li-2022).

# ... load c3h7no as above, then:
sim = ls.Simulation(
    particles=[ls.Particle(shape=ls.Sphere(radius_nm=50), material=c3h7no)],
    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"]).

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

Cauchy (formula 5), λ in µm

n = 1.4074 + 0.01085 λ^{- 2.0} - 0.0008528 λ^{- 4.0} + 5.124 \times 10^{-5} λ^{- 6.0}

Valid from 0.215 to 1.7 µm.

Coefficients as stored

C_i	Value
C1	1.4074
C2	0.01085
C3	-2.0
C4	-0.0008528
C5	-4.0
C6	5.124e-05
C7	-6.0

Comments and conditions

Room temperature.

References

X. Li, C. Wang, L. Ma, L. Liu. Ellipsometry-transmission measurement of the complex refractive indices for a series of organic solvents in the 200–1700 nm spectral range. Infrared Phys. Technol. 125, 104313 (2022)

doi:10.1016/j.infrared.2022.104313 Ellipsometry-transmission measurement of the complex refractive indices for a series of organic solvents in the 200–1700 nm spectral range, Infrared Physics & Technology (2022)

Cite

Xiaoning Li, Chengchao Wang, Lanxin Ma and Linhua Liu. Ellipsometry-transmission measurement of the complex refractive indices for a series of organic solvents in the 200–1700 nm spectral range. Infrared Physics & Technology, 125, 104313 (2022), doi:10.1016/j.infrared.2022.104313; 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

C3H7NO (Dimethylformamide, DMF), Li et al. 2022: n 0.215–1.7 µm: n and k versus wavelength
λ (µm)	n
0.215	1.761785
0.216117	1.75167
0.21724	1.741899
0.218369	1.732459
0.219503	1.723339
0.220644	1.714529
0.22179	1.706017
0.222943	1.697794
0.224101	1.689849
0.225265	1.682174
0.226436	1.674758
0.227612	1.667593
0.228795	1.660671
0.229984	1.653982
0.231179	1.647519
0.23238	1.641274
0.233587	1.63524
0.234801	1.629409
0.236021	1.623775
0.237247	1.61833
0.23848	1.613067
0.239719	1.607981
0.240964	1.603066
0.242216	1.598315
0.243475	1.593723
0.24474	1.589284
0.246012	1.584993
0.24729	1.580844
0.248575	1.576833
0.249866	1.572956
0.251164	1.569206
0.252469	1.56558
0.253781	1.562074
0.2551	1.558683
0.256425	1.555402
0.257757	1.55223
0.259097	1.54916
0.260443	1.546191
0.261796	1.543317
0.263156	1.540537
0.264524	1.537846
0.265898	1.535242
0.26728	1.532721
0.268668	1.53028
0.270064	1.527917
0.271467	1.525629
0.272878	1.523413
0.274296	1.521266
0.275721	1.519187
0.277154	1.517172
0.278594	1.515219
0.280041	1.513327
0.281496	1.511493
0.282959	1.509714
0.284429	1.50799
0.285907	1.506318
0.287392	1.504695
0.288885	1.503121
0.290386	1.501594
0.291895	1.500111
0.293412	1.498672
0.294936	1.497275
0.296469	1.495917
0.298009	1.494599
0.299558	1.493318
0.301114	1.492073
0.302678	1.490863
0.304251	1.489686
0.305832	1.488541
0.307421	1.487428
0.309018	1.486345
0.310624	1.48529
0.312238	1.484264
0.31386	1.483264
0.315491	1.48229
0.31713	1.481341
0.318778	1.480417
0.320434	1.479515
0.322099	1.478636
0.323773	1.477778
0.325455	1.476941
0.327146	1.476124
0.328846	1.475327
0.330554	1.474548
0.332272	1.473787
0.333998	1.473043
0.335733	1.472316
0.337478	1.471605
0.339231	1.47091
0.340994	1.47023
0.342766	1.469564
0.344547	1.468912
0.346337	1.468273
0.348136	1.467647
0.349945	1.467034
0.351763	1.466433
0.353591	1.465844
0.355428	1.465265
0.357275	1.464698
0.359131	1.464141
0.360997	1.463594
0.362873	1.463057
0.364758	1.46253
0.366653	1.462011
0.368558	1.461501
0.370473	1.461
0.372398	1.460507
0.374333	1.460022
0.376278	1.459544
0.378233	1.459074
0.380198	1.458611
0.382174	1.458155
0.384159	1.457706
0.386155	1.457263
0.388162	1.456826
0.390179	1.456396
0.392206	1.455971
0.394244	1.455553
0.396292	1.455139
0.398351	1.454731
0.400421	1.454328
0.402501	1.453931
0.404593	1.453538
0.406695	1.45315
0.408808	1.452766
0.410932	1.452387
0.413067	1.452012
0.415213	1.451642
0.417371	1.451275
0.419539	1.450913
0.421719	1.450554
0.42391	1.4502
0.426113	1.449848
0.428327	1.449501
0.430552	1.449157
0.432789	1.448816
0.435038	1.448479
0.437298	1.448145
0.439571	1.447814
0.441854	1.447486
0.44415	1.447161
0.446458	1.446839
0.448778	1.44652
0.451109	1.446204
0.453453	1.445891
0.455809	1.44558
0.458178	1.445272
0.460558	1.444967
0.462951	1.444664
0.465356	1.444363
0.467774	1.444065
0.470205	1.44377
0.472648	1.443476
0.475104	1.443185
0.477572	1.442897
0.480054	1.44261
0.482548	1.442326
0.485055	1.442044
0.487575	1.441764
0.490109	1.441486
0.492655	1.441211
0.495215	1.440937
0.497788	1.440665
0.500374	1.440396
0.502974	1.440128
0.505587	1.439862
0.508214	1.439599
0.510855	1.439337
0.513509	1.439077
0.516177	1.438818
0.518859	1.438562
0.521555	1.438307
0.524265	1.438055
0.526989	1.437804
0.529727	1.437554
0.532479	1.437307
0.535246	1.437061
0.538027	1.436817
0.540822	1.436575
0.543632	1.436334
0.546457	1.436095
0.549296	1.435858
0.55215	1.435622
0.555019	1.435388
0.557903	1.435155
0.560802	1.434925
0.563715	1.434695
0.566644	1.434468
0.569588	1.434241
0.572548	1.434017
0.575523	1.433794
0.578513	1.433572
0.581519	1.433353
0.58454	1.433134
0.587577	1.432917
0.59063	1.432702
0.593699	1.432488
0.596784	1.432276
0.599885	1.432065
0.603001	1.431855
0.606135	1.431647
0.609284	1.431441
0.61245	1.431236
0.615632	1.431032
0.61883	1.43083
0.622046	1.430629
0.625278	1.43043
0.628526	1.430232
0.631792	1.430035
0.635075	1.42984
0.638375	1.429646
0.641691	1.429454
0.645025	1.429263
0.648377	1.429073
0.651746	1.428885
0.655132	1.428698
0.658536	1.428513
0.661958	1.428329
0.665397	1.428146
0.668854	1.427964
0.672329	1.427784
0.675823	1.427605
0.679334	1.427428
0.682864	1.427251
0.686412	1.427077
0.689978	1.426903
0.693563	1.426731
0.697167	1.42656
0.700789	1.42639
0.70443	1.426221
0.70809	1.426054
0.711769	1.425888
0.715467	1.425723
0.719185	1.42556
0.722922	1.425398
0.726678	1.425237
0.730453	1.425077
0.734249	1.424918
0.738064	1.424761
0.741898	1.424605
0.745753	1.42445
0.749628	1.424296
0.753523	1.424144
0.757438	1.423992
0.761373	1.423842
0.765329	1.423693
0.769306	1.423545
0.773303	1.423399
0.777321	1.423253
0.78136	1.423109
0.785419	1.422966
0.7895	1.422824
0.793602	1.422683
0.797726	1.422543
0.801871	1.422404
0.806037	1.422267
0.810225	1.42213
0.814435	1.421995
0.818666	1.421861
0.82292	1.421727
0.827196	1.421595
0.831493	1.421464
0.835814	1.421334
0.840156	1.421205
0.844522	1.421077
0.84891	1.420951
0.85332	1.420825
0.857754	1.4207
0.862211	1.420577
0.866691	1.420454
0.871194	1.420332
0.87572	1.420212
0.88027	1.420092
0.884844	1.419973
0.889441	1.419856
0.894063	1.419739
0.898708	1.419624
0.903378	1.419509
0.908071	1.419395
0.912789	1.419282
0.917532	1.419171
0.922299	1.41906
0.927091	1.41895
0.931908	1.418841
0.93675	1.418733
0.941617	1.418626
0.94651	1.41852
0.951428	1.418414
0.956371	1.41831
0.96134	1.418207
0.966335	1.418104
0.971356	1.418002
0.976403	1.417902
0.981476	1.417802
0.986576	1.417703
0.991702	1.417605
0.996854	1.417507
1.00203	1.417411
1.00724	1.417315
1.01247	1.41722
1.01773	1.417126
1.02302	1.417033
1.02834	1.416941
1.03368	1.41685
1.03905	1.416759
1.04445	1.416669
1.04988	1.41658
1.05533	1.416492
1.06081	1.416404
1.06633	1.416317
1.07187	1.416232
1.07744	1.416146
1.08303	1.416062
1.08866	1.415978
1.09432	1.415895
1.1	1.415813
1.10572	1.415732
1.11146	1.415651
1.11724	1.415571
1.12304	1.415492
1.12888	1.415414
1.13474	1.415336
1.14064	1.415259
1.14657	1.415182
1.15252	1.415107
1.15851	1.415032
1.16453	1.414958
1.17058	1.414884
1.17666	1.414811
1.18278	1.414739
1.18892	1.414667
1.1951	1.414596
1.20131	1.414526
1.20755	1.414456
1.21383	1.414387
1.22013	1.414319
1.22647	1.414251
1.23284	1.414184
1.23925	1.414118
1.24569	1.414052
1.25216	1.413986
1.25867	1.413922
1.26521	1.413858
1.27178	1.413794
1.27839	1.413731
1.28503	1.413669
1.29171	1.413608
1.29842	1.413546
1.30517	1.413486
1.31195	1.413426
1.31876	1.413367
1.32562	1.413308
1.3325	1.413249
1.33943	1.413192
1.34639	1.413134
1.35338	1.413078
1.36041	1.413022
1.36748	1.412966
1.37459	1.412911
1.38173	1.412856
1.38891	1.412802
1.39612	1.412749
1.40338	1.412696
1.41067	1.412643
1.418	1.412591
1.42537	1.41254
1.43277	1.412489
1.44022	1.412438
1.4477	1.412388
1.45522	1.412339
1.46278	1.41229
1.47038	1.412241
1.47802	1.412193
1.4857	1.412145
1.49342	1.412098
1.50118	1.412051
1.50898	1.412005
1.51682	1.411959
1.5247	1.411914
1.53262	1.411868
1.54059	1.411824
1.54859	1.41178
1.55664	1.411736
1.56473	1.411693
1.57286	1.41165
1.58103	1.411607
1.58924	1.411565
1.5975	1.411524
1.6058	1.411482
1.61414	1.411442
1.62253	1.411401
1.63096	1.411361
1.63944	1.411321
1.64795	1.411282
1.65652	1.411243
1.66512	1.411205
1.67377	1.411167
1.68247	1.411129
1.69121	1.411091
1.7	1.411054

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: —

C₃H₇NO (Dimethylformamide, DMF): all datasets

Li et al. 2022: n 0.215–1.7 µm n 0.215–1.7 µm default

About C3H7NO (Dimethylformamide, DMF)

N,N-Dimethylformamide (C₃H₇NO, DMF) is a colorless, high boiling point, polar aprotic solvent with a faint amine-like odor. It is widely used in organic synthesis and industrial applications due to its ability to dissolve a wide range of compounds. DMF is commonly employed in the production of acrylic fibers, plastics, pesticides, and as a solvent in peptide coupling for pharmaceuticals. It is miscible with water and most organic liquids, making it a versatile solvent in chemical reactions and processes. Chemical formula: HCON(CH₃)₂

More about C3H7NO (Dimethylformamide, DMF) →

Provenance

Version: 1 (snapshot c5c2f18)
Source page: refractiveindex.info
Original file: database/data/organic/C3H7NO - dimethylformamide/nk/Li.yml
ID: ds_cd3ccee7d6e7
API: /v1/datasets/ds_cd3ccee7d6e7

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