Table 2 SERS bands (cm−1) in the range 350–1800 cm−1 of alizarin, carminic acid and indigo identified in Samples 13, 4 and 11, respectively and the most probable bands assignment
From: Colors and dyes of archaeological textiles from Tarapacá in the Atacama Desert (South Central Andes)
Sample 13 | Sample 4 | Sample 11 | Assignment |
|---|---|---|---|
1647vw | υCO/ υCC | ||
1591sh | υCC/ υCO/ ipδNH | ||
1582vs | 1573s | υCC ring | |
1519w | 1553 | υCC ring | |
1475sh | 1472w | 1463w | ipδCH3/ipδCOH/υCC; δCH |
1455vs | υCC/δCOH/ δCH | ||
1370vw | 1397w | υCC/δCH | |
1345m | υ(CC)/δ(CCC) | ||
1331vw | υCC | ||
1322s | δCOH/δCC; Amide III | ||
1295w | ring6 str., def | ||
1258vs | 1257m | υCO/ υCC/ δCCC; ρCHiph, asym/υCN/υCCring6/υCCring5 | |
1249w | δCH | ||
1232w | 1224m | 1215w | δCH/δCCC; δCH |
1163vw | 1171w | υCC/δCH | |
1149w | υCC/υCN; δCH | ||
1132m | 1128w | δNCH Pro | |
1078vw | 1076w | 1081mw | υCC/δCOH; υCC prot |
1042w | υCN Pro | ||
1003 | Breathing ring Phe | ||
956vw | 963m | ρCC/δCCC; skeletal Pro | |
923w | 933w | υC-COO− | |
858vw | 872w | 896vw | ρCH3/δCCC; υCC ring Pro |
804s | 831 | υCC skel | |
762vw | υCC ring | ||
731vs | ρ(CH3)/δCCC | ||
662m | 641s | 644vw | γCO/ γCH/γCOH/τ(CCCC); NCC def |
620 mw | 614vw | SkelVibration | |
567m | 560w | Skel Vibration | |
505w | 501w | Skel Vibration | |
456 s | Skel Vibration | ||
378mw | 389w | Skel Vibration |