Table 1 Characteristic NIR bands of nucleobases.

From: Simulated NIR spectra as sensitive markers of the structure and interactions in nucleobases

Characteristic bands (major contributions)

Nucleobase

Wavenumber (cm−1)

combinations involving νNH

Thymine

4080

combinations involving νCH

Cytosine

4206

combinations involving νNH, δipNH, νasCH3

Thymine

4354–4332

combinations involving νCH, δrockNH2, δipring

Adenine

4361

combinations involving νNH, δipNH

Thymine

4426

combinations involving δipNH, δipring

Guanine

4493

combinations involving νasNH2, δrockNH2, δipring

Cytosine

4519–4481

combinations involving νasNH2,

Adenine

4528

combinations involving νNH, δipNH, δrockNH2

Thymine

4550

combinations involving δipCH, δipring

Adenine

4768

combinations involving νasNH2, δscissNH2

Guanine

4908

combinations involving δscissNH2, δipNH

Adenine

4972–4946

combinations involving δscissNH2, δipring, δipNH

Cytosine

4997

combinations involving δipNH, δscissNH2

Guanine

4998

combinations involving νasCH3, νsCH3

Thymine

5997

combinations involving νNH

Cytosine

5992

combinations involving νCH

Adenine

6149–6082

combinations involving νNH, νCH

Guanine

6148–6103

overtones of νNH

Adenine

6670–6450

overtones of νNH

Cytosine

6970–6720

overtones of νNH, νCH

Guanine

6940–6025

overtones of νNH, νCH

Thymine

6500–5890