One- and two-photon absorption and emission properties of a Zn(II) chemosensor |
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| Authors: | Bozio Renato Cecchetto Elio Fabbrini Graziano Ferrante Camilla Maggini Michele Menna Enzo Pedron Danilo Riccò Raffaele Signorini Raffaella Zerbetto Michele |
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| Institution: | Dipartimento di Scienze Chimiche, Unità di Ricerca INSTM e ITM-CNR, Università di Padova, Via Marzolo 1, I-35131 Padova, Italy. |
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| Abstract: | This paper presents the synthesis and two photon-induced absorption (TPA) properties of a functionalized distyrylbenzene (DSB) 1 containing a tetra-azacyclododecane (cyclen) receptor for Zn(II). The influence of Zn(II) on one- and two-photon absorption characteristics of 1 has been investigated in dimethyl sulfoxide. The experiments show that the TPA action spectrum of uncomplexed 1, at 750 nm employing nanosecond-long excitation pulses, is 5 times more intense than that of the complexed form. This moderate contrast between the bound and unbound species confirms, however, the potential of this design scheme for the development of molecular structures with enhanced sensitivity and contrast to be used as Zn(II) sensors through TPA-induced fluorescence microscopy. |
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