Synthesis 2018; 50(06): 1284-1292
DOI: 10.1055/s-0036-1591856
paper
© Georg Thieme Verlag Stuttgart · New York

Extending the Conjugation of Pechmann Lactone Thienyl Derivatives: A New Class of Small Molecules for Organic Electronics Application

Alessio Dessì
a   Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy   Email: gianna.reginato@iccom.cnr.it
,
Matteo Bartolini
a   Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy   Email: gianna.reginato@iccom.cnr.it
b   Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena, Via A. Moro 2, 53100 Siena, Italy
,
Massimo Calamante*
a   Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy   Email: gianna.reginato@iccom.cnr.it
c   Dipartimento di Chimica ‘U. Schiff’, Università degli Studi di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
,
Lorenzo Zani
a   Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy   Email: gianna.reginato@iccom.cnr.it
,
Alessandro Mordini
a   Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy   Email: gianna.reginato@iccom.cnr.it
c   Dipartimento di Chimica ‘U. Schiff’, Università degli Studi di Firenze, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
,
Gianna Reginato*
a   Istituto di Chimica dei Composti Organometallici (CNR-ICCOM), Via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy   Email: gianna.reginato@iccom.cnr.it
› Author Affiliations
Further Information

Publication History

Received: 12 October 2017

Accepted after revision: 10 November 2017

Publication Date:
20 December 2017 (online)


Abstract

The preparation and spectroscopic characterization of some symmetrical small molecules containing the disubstituted (E)-3,3′-bifuranylidene-2,2′-dione chromophore (the so-called Pechmann lactone) and featuring an extended conjugation are reported. The synthetic approach of such compounds is based on the Stille–Migita coupling reaction, which is carried out in very mild conditions, suitable to be applied with the very sensitive Pechmann core. The absorption and emission spectra of the new molecules obtained have been recorded in solution and clearly show how their photophysical properties can be modulated by a proper choice of the (hetero)aromatic terminal groups. The compounds prepared in this study (or close analogues thereof) have interesting optical properties and could find application as semiconductors in organic electronics or as near-IR fluorescent dyes.

Supporting Information