Comparative Study of Pure and Doped Single Crystals of Lead Iodide Dihydrate and Lead Tartrate Dihydrate Grown in Silica Gel Using Fourier Transform Raman Spectra

Table 1

Comparative study on the spectral datas of PbI₂⋅2H₂O & PbC₄H₄O₆⋅2𝐻₂𝑂.

Pure PbI2 Bands cm^−1	Doped PbI2bands cm^−1	Assignment of bands	Pure PbC4H4O6 bands cm^−1	Doped PbC4H4O6 bands cm^−1	Assignment of bands
3012	3254	OH stretching	2965	2940	asymmetric and symmetric stretch of C–H
				2918
2515	2516	O–H tortional	1598	1574	H–O–H bending,
2336	2335	mode and	1419	1440	O–H tortional mode
2312	2310	interaction with	1299	1392
2267	2267	other molecule with interaction between the hydroxyl group	1236	1308	Fermi Resonance producing splitting of carbonyl group
2243	2221	The splitting provides direct insight into the	1124	1276
2122	2184		1066	1240
2078	2077	structure of hydrogen bonds and into process of bond	1005	1120	C–O stretch coupled with in-plane bending of C–H mode
2062	2062		927	1078
2030	2034	formation and cleaveage	901	1002
		O–D stretch	820	894	C–O–H and –C=O group bending
			718	829
			597	806
			549	710
			430	618
			323	642
			276	506
			172	438	C=O stretching band
				311
				290	OH tortional mode
				260	out-of plane bending of C–O–H
				198
				168	The bond correlated with out-of-plane bending mode of C–O–H
				142
				123
					out-of-plane bending mode of hydrogen bonding