The Study of Naphthoquinones and Their Complexes with DNA by Using Raman Spectroscopy and Surface Enhanced Raman Spectroscopy: New Insight into Interactions of DNA with Plant Secondary Metabolites

Table 2

The changes of the Raman intensities after the modification of DNA by the selected naphthoquinones: w-weak, m-medium, s-strong, sh-shoulder, br-broad, as-asymmetric.

Peak (cm^−1)	Assignment	1,4-Naphthoquinone	Binaphthoquinone	Juglone	Lawsone	Plumbagin
670	dT, dA	670 m	667 m	667 m	667 m	667 w
683	dG	—	—	—	—	—
729	A	—	—	—	—	—
750	dT	740 w	—	741 w	—	—
787	bk O-P-O str. + dT	805 m	804 m, br	807 m, br	807 m	807 m
834	bk O-P-O B-DNA	827 w	—	821 w	—	—
894	dr, C2′H2 rock	—	—	—	—	—
922	dr, ring str.	—	—	—	—	916 m
970	T C6H op-def, bk	—	—	—	—	—
1014	T CH3 rock	—	—	—	—	1018 sh
1054	bk C-O str.	1079 m-s	1038 m, br	1076 m-s	1039 m, br	1073 s, br
1093	POsym., str.	1110 w	—	—	—	—
1143	dT	—	—	1142 w	—	1147 m
1178	dT, dG, dC	—	—	—	—	1176 w
1217	dT, dA, dG	—	—	1215 sh	—	1216 m, as
1237	dT, dC	—	1239 m-s, br	1237 m	1240 m, br	—
1256	dC, dA, dT (dG)	—	—	—	—	—
1307	dA, dT	—	—	1281 w	1304 w	—
1338	dA, dG	—	—	1323 w	1322 sh	—
1376	T, CH3def	1377 s, 1398 w	1350 m, br	1359 m	1355 m, br	1384 w
1421	dr C5′H2def	—	—	—	—	—
1446		1448 w	1452 w	1448 w	1448 w	1442 w
1462		—	—	—	—	—
1490	G im. ring, dA, dT	1490 s, as	1490 s	1490 s	1490 s, as	1490 s
1511		1509 w	1502 w	1502 w	1503 w, sh	1507 m
1578	dG, dA	1574 s, as	1578 s, as	1578 s, as	1579 s, as	1576 s
1669	T, dG	1688 w	1688 m, as	1685 m, as	1689 w, br	1680 m-s, br, as