. Author manuscript; available in PMC: 2011 May 20.

Published in final edited form as: J Phys Chem B. 2010 May 20;114(19):6636–6641. doi: 10.1021/jp100082n

Table 1.

UVRR frequencies and bandwidths (w) of the amide bands of polygly

	Polygly in 1.5M LiClO₄ solution		Solid polygly, mostly PGII sample		Solid polygly, mostly PGI sample		Gly₅, PGI crystal
	ν/cm⁻¹	w/cm⁻¹	ν/cm⁻¹	w/cm⁻¹	ν/cm⁻¹	w/cm⁻¹	ν/cm⁻¹	w/cm⁻¹
CH_{2 twist}	1254	42	1249	41	1253	43	1249	27
Am III	1300	58	1291	56	1216	24	1219	20
CH_{2 wag}	1386	32	1380	26	1404	41	1400	28
Am II	1562	58	1563	37	1519	39	1525	25
Am I	1667	79^*	1663	31	1675	28	1674	15

The amide I band of polygly in water is unusually broad, likely due to the residual contribution from the water bending vibration.