title: Spectroscopic behavior of cationic metallophthalocyanines in the presence of anionic quantum dots.
abstract: The interactions and spectroscopic properties between cationic zinc phthalocyanine derivatives (peripherally and non-peripherally tetrasubstituted and peripherally octa substituted with 2-diethylmethylaminoethylsulfanyl (betaTZnPc, alphaTZnPc and betaOZnPc)) and CdTe core quantum dots (QDs) capped with mercaptopropionic acid or thioglycolic acid (represented as CdTe@MPA and CdTe@TGA, respectively) have been studied in methanol:water mixture. Strong coupling of MPcs was deduced from the interaction since the UV-vis spectroscopic studies of the ground state complex formed on mixing both components showed loss of the phthalocyanine monomeric band with the formation of a dimeric band (spectrum of aggregated species). The dimerization constants were of the order of 10(4)M(-1).
authors: Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa.
authors: Mopelola
authors: M
authors: Idowu
authors: Tebello
authors: T
authors: Nyokong
mesh_terms: D000838:Anions / Q000737:chemistry*; D002104:Cadmium / Q000737:chemistry; D007211:Indoles / Q000737:chemistry*; D054833:Isoindoles; D015394:Molecular Structure; D045663:Quantum Dots; D011838:Radiation-Sensitizing Agents / Q000737:chemistry*; D013057:Spectrum Analysis / Q000379:methods*; D013438:Sulfhydryl Compounds / Q000737:chemistry; D015032:Zinc / Q000737:chemistry*
chemical_list: D000838:Anions; D007211:Indoles; D054833:Isoindoles; D011838:Radiation-Sensitizing Agents; D013438:Sulfhydryl Compounds; D002104:Cadmium; D015032:Zinc; C013647:phthalocyanine