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. Author manuscript; available in PMC: 2020 Apr 11.
Published in final edited form as: J Phys Chem A. 2019 Apr 2;123(14):3098–3108. doi: 10.1021/acs.jpca.9b00906

Table 6.

TD-ωb97xd-PCM/6-31G(3df,p) calculated vertical lowest lying transition energies (ΔE) in eV, and oscillator strength (f) of G(N2-H)-C. Structure is shown in scheme 1(e). See Figure S6 in the supporting information for MOs involved in transitions.

State Transitiona ΔE
(eV)
λ
(nm)
f Contribution Red-shift 70 nm Exp.
(nm)d
ΔE (eV) λ (nm)
D1 GC(π)→G(π*)b 2.30 540 0.1903 83%a 2.03 610 610
D2 GC(n)→G(π*)b 2.62 473 0.0008 80%a 2.28 543
D3 GC(n)→G(π*)b 2.70 459 0.0009 66%a 2.34 529
D4 G(π)→G(π*) 3.03 409 0.0178 93% 2.59 479
D5 C(π)→C(π*) 3.67 338 0.0000 87% 3.04 408
D6 GC(n)→G(π*)b 3.69 336 0.0001 87%a 3.05 406
D7 G(π)→G(π*) 3.86 321 0.0672 86% 3.17 391 380
D8 C(π)→G(π*) 4.03 307 0.0020 84% 3.29 377
D9 GC(π)→G(π*)b 4.28 290 0.0002 72% 3.44 360
D10 G(π)→G(π*)c 4.34 286 0.1315 71% 3.48 356
D11 G(n)→G(π*) 4.36 284 0.0000 75% 3.50 354
D12 C(π)→C(π*)c 4.55 273 0.0000 63% 3.62 343
D13 GC(n)→G(π*)b 4.82 257 0.0001 56% 3.79 327
D14 C(π)→C(π*) 5.04 246 0.1953 86% 3.92 316 306
a

Nature (D1= LE, CT; D2= LE, CT; D3=LE, CT; D4=LE; D5=LE; D6=LE, CT; D7=LE; D8= CT; D9= LE, CT; D10= LE, CT; D11= LE; D12= LE). LE = Local excitation; CT = charge transfer.

b

delocalized on G and C

c

Some mixing with C.

d

References 14, 19.