title: Design and synthesis of donor-acceptor pyrazabole derivatives for multiphoton absorption.
abstract: A series of ferrocenyl substituted pyrazaboles were prepared, which have an electron-withdrawing pyrazabole moiety as the central core, with a D-π-A-π-D structural motif (D = donor, A = acceptor) and containing a variety of π bridges. A crystallographic study reveals that the pyrazabole central core was observed in planar geometry. Strong two-photon absorption in the visible region and three-photon absorption in the near IR region were observed in the ferrocenyl substituted pyrazaboles. It was observed that the 2PA absorption cross-section increases with the conjugation length.
authors: Department of Chemistry, Indian Institute of Technology, Indore, Madhya Pradesh 452 017, India.
authors: Thaksen
authors: T
authors: Jadhav
authors: Ramesh
authors: R
authors: Maragani
authors: Rajneesh
authors: R
authors: Misra
authors: V
authors: V
authors: Sreeramulu
authors: D Narayana
authors: DN
authors: Rao
authors: Shaikh M
authors: SM
authors: Mobin