- Title
- First example of nonlinear optical materials based on nanoconjugates of sandwich phthalocyanines with quantum dots
- Creator
- Oluwole, David O
- Creator
- Yagodin, Alexey V
- Creator
- Mkhize, Nhlakanipho C
- Creator
- Sekhosana, Kutloana E
- Creator
- Martynov, Alexander G
- Creator
- Gorbunova, Yulia G
- Creator
- Tsivadze, Aslan Yu
- Creator
- Nyokong, Tebello
- Subject
- To be catalogued
- Date Issued
- 2017
- Date
- 2017
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/238014
- Identifier
- vital:50577
- Identifier
- xlink:href="https://doi.org/10.1002/chem.201604401"
- Description
- We report original, selective, and efficient approaches to novel nonlinear optical (NLO) materials, namely homoleptic double- and triple-decker europium(III) complexes 2 and 3 with the A3B-type phthalocyanine ligand (2,3-bis[2′-(2′′-hydroxyethoxy)ethoxy]-9,10,16,17,23,24-hexa-n-butoxyphthalocyanine 1) bearing two anchoring diethyleneglycol chains terminated with OH groups. Their covalently linked nanoconjugates with mercaptosuccinic acid-capped ternary CdSeTe/CdTeS/ZnSeS quantum dots are prepared in the presence of an ethyl(dimethylaminopropyl)carbodiimide activating agent. 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 (532 nm laser and pulse rate of 10 ns). For comparison, symmetrical double- and triple-decker EuIII octa-n-butoxyphthalocyaninates 5 and 6 and their mixtures with trioctylphosphine oxide-capped QDs are also synthesized and studied. It is revealed that both lowering of molecular symmetry and expansion of the π-electron system upon moving from double- to triple-decker complexes significantly improves the OL characteristics, making the low-symmetry triple-decker complex 3 the most efficient optical limiter in the studied family of sandwich complexes, affording 50 % lowering of light transmittance below 0.5 J cm−2 input fluence. Conjugation (both covalent and noncovalent) with QDs affords further enhancement of the OL properties of both double- and triple-decker complexes. Altogether, the obtained results contribute to the development of novel nonlinear optical materials for future nanoelectronic and optical device applications.
- Format
- computer
- Format
- online resource
- Format
- application/pdf
- Format
- 1 online resource (11 pages)
- Format
- Publisher
- Wiley Library Online
- Language
- English
- Relation
- Chemistry–A European Journal
- Relation
- Oluwole, D.O., Yagodin, A.V., Mkhize, N.C., Sekhosana, K.E., Martynov, A.G., Gorbunova, Y.G., Tsivadze, A.Y. and Nyokong, T., 2017. First example of nonlinear optical materials based on nanoconjugates of sandwich phthalocyanines with quantum dots. Chemistry–A European Journal, 23(12), pp.2820-2830
- Relation
- Chemistry–A European Journal volume 23 number 12 p. 2820 2017 1521-3765
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Wiley Library Online Terms of Use Statement (https://onlinelibrary.wiley.com/terms-and-conditions)
- Rights
- Closed Access
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Collections
RU DST/NRF SARChI for Medicinal Chemistry and Nanotechnology
Nyokong, Tebello (Distinguished Professor)
RU Department of Chemistry
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