Issue 37, 2012
From the journal:

Journal of Materials Chemistry

Novel highly conjugated push–pull 4,5-diazafluoren-9-ylidene based efficient NLO chromophores as a springboard for coordination complexes with large second-order NLO properties

Alessia Colombo,ab   Claudia Dragonetti,*ab   Stefania Righetto,ab   Dominique Roberto,abc   Adriana Valore,bc   Tiziana Benincori,*de   Francesca Colombod  and  Francesco Sannicolòa  

* Corresponding authors

a Dipartimento di Chimica dell'Università degli Studi di Milano, Italy

b UdR INSTM di Milano, via Golgi 19, 20133 Milano, Italy
E-mail: claudia.dragonetti@unimi.it

c Istituto di Scienze e Tecnologie Molecolari, CNR, Via Venezian 21, 20133 Milano, Italy

d Dipartimento di Scienza ed Alta Tecnologia dell'Università dell'Insubria, Via Valleggio 11, 22100 Como, Italy

e Istituto di Scienze e Tecnologie Molecolari, CNR, Via Golgi 19, 20133 Milano, Italy

Abstract

Two new ligands Ln: N,N-dibutyl-(4,5-diazafluorenyl-9-ylidene-penta-1,3-dienyl)-amine (L2) and 9-[(1-azulenyl)methylene]-4,5-diazafluorene (L3), along with the related Zn(II) complexes with ancillary ligands of different electron withdrawing strengths ([Zn(CH3CO2)2Ln], [Zn(CF3CO2)2Ln] and [Zn(CF3SO3)2Ln]) were prepared and characterized. Their remarkable second-order NLO properties were investigated using the EFISH technique. The μβ1.91 value of [Zn(CF3SO3)2L2] is strongly dependent on concentration, reaching, to our knowledge, the highest value reported for a Zn(II) complex.

Graphical abstract: Novel highly conjugated push–pull 4,5-diazafluoren-9-ylidene based efficient NLO chromophores as a springboard for coordination complexes with large second-order NLO properties

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Article information

DOI
https://doi.org/10.1039/C2JM33509C
Article type
Paper
Submitted
31 May 2012
Accepted
30 Jul 2012
First published
01 Aug 2012

J. Mater. Chem., 2012,22, 19761-19766

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Novel highly conjugated push–pull 4,5-diazafluoren-9-ylidene based efficient NLO chromophores as a springboard for coordination complexes with large second-order NLO properties

A. Colombo, C. Dragonetti, S. Righetto, D. Roberto, A. Valore, T. Benincori, F. Colombo and F. Sannicolò, J. Mater. Chem., 2012, 22, 19761 DOI: 10.1039/C2JM33509C

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