Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science
RESEARCH ARTICLE

The History of Azulenyl Squaraines

Daniel E. Lynch A C and Darren G. Hamilton B
+ Author Affiliations
- Author Affiliations

A Exilica Limited, The Technocentre, Puma Way, Coventry CV1 2TT, UK.

B Department of Chemistry, Mount Holyoke College, 50 College Street, South Hadley, MA 01075, USA.

C Corresponding author. Email: d.lynch@exilica.co.uk




Daniel Lynch is a materials chemist, and received his B.App.Sc. (1990) and Ph.D. (1994) degrees from QUT in Brisbane (Australia). A post-doctoral fellowship at Cranfield University (UK) preceded a six-year university research fellowship at Coventry University (UK), becoming Senior Lecturer in 2001 and Reader of Applied Chemistry in 2007 at the same institution. He is the author of over 240 research publications, the principal inventor of Exilica's patented technology and became the full-time Technical Director of Exilica Limited in 2007, a post that he had held on a part-time basis since Exilica's incorporation in May 2005. He was on the 2005-2006 Enterprise Fellowship Scheme and was a 2004-2005 Midlands Medici Fellow.



Darren Hamilton was born in southern England in 1969 and received his B.Sc. degree from Royal Holloway College, University of London, in 1990. A Ph.D. in organic chemistry from the University of Southampton (1994) was followed by several years as a post-doctoral researcher and Ramsay Memorial Research Fellow, principally in the research group of Jeremy Sanders CBE, FRS, at the University of Cambridge. He taught chemistry from 1997–1999 at Murray Edwards College (formerly New Hall), a college of the University of Cambridge, an experience that led him to accept a position on the faculty of Mount Holyoke College (Massachusetts, USA) in the summer of 1999. He continues to explore topics in supramolecular and materials chemistry as Professor of Chemistry at this institution.

Australian Journal of Chemistry - https://doi.org/10.1071/CH16383
Submitted: 2 July 2016  Accepted: 9 February 2017   Published online: 3 March 2017

Abstract

The synthesis of the first azulenyl squaraine dye was reported in 1966 and the paucity of activity in the scientific literature since that time has given the false impression that they have remained relatively unexplored as organic dyes. In contrast, a wealth of research activity on azulenyl squaraines has been recorded in the patent literature and it is the purpose of this review to bring these reports to the attention of scientists that have an interest in the chemistry and applications of squaraine dyes. This review shows that it is possible to prepare, via targeted substitution of the azulene ring, a dye with an absorption maximum value ranging from 650 to 840 nm.


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