A Chiral Bis(salicylaldiminato)zinc(II) Complex with Second-Order Nonlinear Optical and Luminescent Properties in Solution

Paola Matozzo,Claudia Dragonetti,Stefania Righetto,Daniele Marinotto,Simona Fantacci,Paolo Biagini,Dominique Roberto,Alessia Colombo

doi:10.3390/inorganics8040025

Paola Matozzo, Claudia Dragonetti + Show 6 more

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https://doi.org/10.3390/inorganics8040025

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Journal: Inorganics	Publication Date: Apr 1, 2020
Citations: 18	License type: CC BY 4.0

Affiliation: University of Milan, Eni (Italy)

Abstract

Whereas there is an increasing amount of reports on the second-order nonlinear optical (NLO) and luminescence properties of tetradentate [N2O2] Schiff base–zinc complexes, the study of zinc complexes having two bidentate [NO] Schiff-base ligands is relatively unexplored from an NLO point of view. This work puts in evidence that the known chiral bis{2-[(R)-(+)-1-phenylethyliminomethyl]phenolato-N,O}zinc(II) complex is a fascinating multifunctional molecular inorganic–organic hybrid material characterized by interesting second-order NLO and luminescent properties in solution. The emissive properties of the organic 2-(R)-(+)-1-phenylethyliminomethyl]phenol proligand are greatly enhanced upon coordination to the inorganic Zn(II) center.

Highlights

Coordination compounds with second-order nonlinear optical (NLO) properties represent a topic of growing interest as molecular inorganic–organic hybrid materials for emerging optoelectronic and optical signal processing [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]
This work unveils the interesting properties in solution of the chiral bis{2-[(R)-(+)-1-phenylethyliminomethyl]phenolato-N,O}zinc(II) complex
It was previously reported that powder samples of this complex exhibit second-harmonic generation [78]

Summary

Introduction

Coordination compounds with second-order nonlinear optical (NLO) properties represent a topic of growing interest as molecular inorganic–organic hybrid materials for emerging optoelectronic and optical signal processing [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15]. Metals serve as perfect templates to construct three-dimensional structures, affording dipolar and octupolar molecules [10,19] In this panorama, coordination compounds showing both luminescent and NLO properties are appealing as new multifunctional molecular materials [20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36]. Depending on the nature of the ligands, Zn(II) complexes can have various geometries (tetrahedral, square pyramidal, octahedral) and number of coordination (4, 5, and 6), affording NLO-active dipolar and octupolar compounds

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Results

Conclusion