Significant modification of the I-3 Lewis base character in the β-cyclodextrin polyiodide inclusion complex with Co2+ ion: An FT-Raman investigation

Charalampopoulos, VG; Papaioannou, JC; Tsekouras, AA; Kakali, G; Karayianni, HS

dc.contributor.author	Charalampopoulos, VG	en
dc.contributor.author	Papaioannou, JC	en
dc.contributor.author	Tsekouras, AA	en
dc.contributor.author	Kakali, G	en
dc.contributor.author	Karayianni, HS	en
dc.date.accessioned	2014-03-01T01:37:04Z
dc.date.available	2014-03-01T01:37:04Z
dc.date.issued	2011	en
dc.identifier.issn	13861425	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/21435
dc.subject	β-Cyclodextrin inclusion complex	en
dc.subject	Charge-transfer	en
dc.subject	Heptaiodides	en
dc.subject	Order-disorder	en
dc.subject	Raman spectroscopy	en
dc.subject.other	Charge transfer interaction	en
dc.subject.other	Dielectric measurements	en
dc.subject.other	Disorder-order transitions	en
dc.subject.other	Electron-transfer	en
dc.subject.other	FT- Raman spectroscopy	en
dc.subject.other	FT-Raman	en
dc.subject.other	Heptaiodides	en
dc.subject.other	Inclusion complex	en
dc.subject.other	Lewis base	en
dc.subject.other	Polyiodides	en
dc.subject.other	Temperature range	en
dc.subject.other	Charge transfer	en
dc.subject.other	Complexation	en
dc.subject.other	Ions	en
dc.subject.other	Molecules	en
dc.subject.other	Raman scattering	en
dc.subject.other	Raman spectroscopy	en
dc.subject.other	Cobalt compounds	en
dc.subject.other	beta cyclodextrin derivative	en
dc.subject.other	cobalt	en
dc.subject.other	iodide	en
dc.subject.other	ion	en
dc.subject.other	Lewis base	en
dc.subject.other	article	en
dc.subject.other	chemistry	en
dc.subject.other	electron transport	en
dc.subject.other	Fourier analysis	en
dc.subject.other	methodology	en
dc.subject.other	Raman spectrometry	en
dc.subject.other	beta-Cyclodextrins	en
dc.subject.other	Cobalt	en
dc.subject.other	Electron Transport	en
dc.subject.other	Fourier Analysis	en
dc.subject.other	Iodides	en
dc.subject.other	Ions	en
dc.subject.other	Lewis Bases	en
dc.subject.other	Spectrum Analysis, Raman	en
dc.title	Significant modification of the I-3 Lewis base character in the β-cyclodextrin polyiodide inclusion complex with Co2+ ion: An FT-Raman investigation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.saa.2011.08.031	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.saa.2011.08.031	en
heal.publicationDate	2011	en
heal.abstract	The β-cyclodextrin (β-CD) polyiodide inclusion complex (β-CD)2·Co0.5·I7· 21H2O has been synthesized, characterized and further investigated via FT-Raman spectroscopy in the temperature range of 30-120 °C. The experimental results point to the coexistence of I-7 units (I2·I-3·I2) that seem not to interact with the Co2+ ions and I-7 units that display such interactions. The former units exhibit a disorder-order transition of both their I2 molecules above 60 °C due to a symmetric charge-transfer interaction with the central I-3 [I2 ← I-3 → I2], whereas in the latter units only one of the two I2 molecules becomes well-ordered above 30 °C. The other I2 molecule remains disordered presenting no charge-transfer phenomena. The Co2+ ion induces a considerable asymmetry on the geometry of the I-3 anion and a significant modification of its Lewis base character. Complementary dielectric measurements suggest no important involvement of H⋯I contacts in the observed modification of the I-3 electron-transfer properties. © 2011 Elsevier B.V.	en
heal.journalName	Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy	en
dc.identifier.doi	10.1016/j.saa.2011.08.031	en
dc.identifier.volume	83	en
dc.identifier.issue	1	en
dc.identifier.spage	279	en
dc.identifier.epage	287	en