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Reference type: Conference Proceeding
Authors: Sagawa T, Kudo M, Steinke JHG, Morii T
Publication date: 2006
Article title: Surface molecularly imprinted TiO2 nanoparticle for photoreduction of viologen.
Page numbers: 25-30
Alternative URL: http://www.mrs.org/s_mrs/sec_subscribe.asp?CID=6440&DID=179203&action=detail

Editors: Ellingson R
Publisher: Materials Research Society
Volume number: 945

Abstract: Photo-induced reduction of viologen (V) with surface-modified TiO 2 was investigated (Scheme 1). In order to enhance the reduction of V, cavities for molecular recognition of V were fabricated on the surface of TiO2 through sol-gel imprinting method. Once TiO2 had recognition site for the oxidized viologen (V2+) on its surface, it was distinguishable through shape or charge differences from the reduced viologen (V+) and facilitated the inclusion of target molecule resulted in enhancement of the photoinduced reduction efficiently. The formation of viologen monocation radicals from three different types of viologens (methyl-, hexyl-, and pentacarboxyl-) was monitored spectrophotometrically with time in the presence of the imprinted TiO2 and also using a blank. Higher conversion was observed in every case of imprinted TiO2 compared with the blank one indicating that recognition was not an ill-defined surface effect but involved the bipyridinium part of the viologen. 2006 Materials Research Society
Template and target information: viologen, V


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