CdS Nanoparticles Modified to Chalcogen Sites:  New Supramolecular Complexes, Butterfly Bridging, and Related Optical Effects

All present approaches to surface modification of nanoparticles (NPs) with organic ligands exploit metal (cadmium) sites as anchor points. To obtain efficient interaction of NP surface with p-orbitals of organic chromophores, we utilize the chalcogen (sulfur) sites on the NP surface. These sites pre...

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Bibliographic Details
Published in:Journal of the American Chemical Society 2002-04, Vol.124 (15), p.3980-3992
Main Authors: Ni, Tong, Nagesha, Dattatri K, Robles, Juvencio, Materer, Nicholas F, Müssig, Stefan, Kotov, Nicholas A
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
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Summary:All present approaches to surface modification of nanoparticles (NPs) with organic ligands exploit metal (cadmium) sites as anchor points. To obtain efficient interaction of NP surface with p-orbitals of organic chromophores, we utilize the chalcogen (sulfur) sites on the NP surface. These sites present several advantages stemming from a stronger interaction of their atomic orbitals with both modifier and NP core. The chalcogen modification of CdS was achieved by using a mixed ligand (2,2‘-bipyridyl-N,N‘)(malonato-O,O‘)-copper(II) monohydrate complex. The weak monodentate ligands (water) are replaced by a copper−sulfur bond during the modification reaction. The structure of the product was investigated by optical spectroscopy, electron spin resonance, and nuclear magnetic resonance. The modified NP can be described as a few tens (
ISSN:0002-7863
1520-5126
DOI:10.1021/ja017149a