Example of Nonlinear Optical Materials Based on Nanoconjugates of Phthalocyanines with Quantum Dots

What is it about?

The original, selective, and efficient approaches to novel nonlinear optical (NLO) materials, based on homoleptic double- and triple-decker europium(III) complexes with the A3B-type phthalocyanine. Their covalently linked nanoconjugates with mercaptosuccinic acid-capped ternary CdSeTe/CdTeS/ZnSeS quantum dots are prepared Optical limiting (OL) properties of the obtained low-symmetry complexes and their conjugates with quantum dots (QDs) are measured for the first time by the open-aperture Z-scan technique. It is revealed that both lowering of molecular symmetry and expansion of the p-electron system upon moving from double- to triple-decker complexes significantly improves the OL characteristics, making the low-symmetry triple-decker complex the most efficient optical limiter in the studied family of sandwich complexes, affording 50% lowering of light transmittance below 0.5 Jcm@2 input fluence. Conjugation (both covalent and noncovalent) with QDs affords further enhancement of the OL properties of both double- and triple-decker complexes. the obtained results contribute to the development of novel nonlinear optical materials for future nanoelectronic and optical device applications.

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Why is it important?

The obtained results contribute to the development of novel nonlinear optical materials for future nanoelectronic and optical device applications.

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