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Ogunsipe A, Nyokong T. Effects of central metal on the photophysical and photochemical properties of non-transition metal sulfophthalocyanine. J PORPHYR PHTHALOCYA 2012. [DOI: 10.1142/s1088424605000186] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The photophysical and photochemical properties and quenching (by 1,4-benzoquinone) of metallophthalocyanine sulfonates of aluminium ( AlPcSmix), zinc ( ZnPcSmix), silicon ( SiPcSmix), germanium ( GePcSmix) and tin ( SnPcSmix) are presented. The quantum yield values of fluorescence (ΦF), triplet state (ΦT), singlet oxygen (ΦΔ) and photodegradation (Φd) were determined and the observed trends in their variation among the complexes discussed in terms of aggregation and the heavy atom effect. 1,4-benzoquinone effectively quenched the fluorescence of the complexes. Quenching analyses gave positive deviations from Stern-Volmer behavior, suggesting the existence of static quenching in addition to dynamic quenching. The static and dynamic components of the quenching were separated using a modified Stern-Volmer equation and the “sphere of action quenching model”. The quenching constant was found to be a function of the radius of the central metal ion.
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Affiliation(s)
- Abimbola Ogunsipe
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa
| | - Tebello Nyokong
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa
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Lin CH, Chen CS, Shiryaev AA, Zubavichus YV, Lii KH. K3(U3O6)(Si2O7) and Rb3(U3O6)(Ge2O7): A Pentavalent-Uranium Silicate and Germanate. Inorg Chem 2008; 47:4445-7. [DOI: 10.1021/ic800300v] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chia-Hui Lin
- Department of Chemistry, National Central University, Chungli, Taiwan, Institute of Crystallography RAS, Leninsky prospekt 59, Moscow, Russia, RRC Kurchatov Institute, Kurchatov sq. 1, Moscow, Russia, and Institute of Chemistry, Academia Sinica, Taipei, Taiwan
| | - Chih-Shan Chen
- Department of Chemistry, National Central University, Chungli, Taiwan, Institute of Crystallography RAS, Leninsky prospekt 59, Moscow, Russia, RRC Kurchatov Institute, Kurchatov sq. 1, Moscow, Russia, and Institute of Chemistry, Academia Sinica, Taipei, Taiwan
| | - A. A. Shiryaev
- Department of Chemistry, National Central University, Chungli, Taiwan, Institute of Crystallography RAS, Leninsky prospekt 59, Moscow, Russia, RRC Kurchatov Institute, Kurchatov sq. 1, Moscow, Russia, and Institute of Chemistry, Academia Sinica, Taipei, Taiwan
| | - Ya. V. Zubavichus
- Department of Chemistry, National Central University, Chungli, Taiwan, Institute of Crystallography RAS, Leninsky prospekt 59, Moscow, Russia, RRC Kurchatov Institute, Kurchatov sq. 1, Moscow, Russia, and Institute of Chemistry, Academia Sinica, Taipei, Taiwan
| | - Kwang-Hwa Lii
- Department of Chemistry, National Central University, Chungli, Taiwan, Institute of Crystallography RAS, Leninsky prospekt 59, Moscow, Russia, RRC Kurchatov Institute, Kurchatov sq. 1, Moscow, Russia, and Institute of Chemistry, Academia Sinica, Taipei, Taiwan
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Serra DL, Hwu SJ. Synthesis and structural characterization of Ba6Nb14Si4O47. The first member of the new barium niobium(IV/V) oxosilicate series(Ba3Nb6Si4O26)n(Ba3Nb8O21), n = 1. J SOLID STATE CHEM 1992. [DOI: 10.1016/0022-4596(92)90197-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Abrahams SC, Zyontz LE, Bernstein JL, Remeika JP, Cooper AS. Piezoelectric K3Ta3B2O12: Crystal structure at room temperature and crystal growth. J Chem Phys 1981. [DOI: 10.1063/1.441947] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
| | - L. E. Zyontz
- Bell Laboratories, Murray Hill, New Jersey 07974
| | | | | | - A. S. Cooper
- Bell Laboratories, Murray Hill, New Jersey 07974
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Application de la spectrometrie vibrationnelle à un probleme de non-stoechiométrie par insertion dans les tunnels pentagonaux des réseaux (M6X4O26) (M = Nb, Ta; X = Si, Ge). J SOLID STATE CHEM 1978. [DOI: 10.1016/0022-4596(78)90136-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Groult D, Chailleux JM, Choisnet J, Raveau B. Sur une nouvelle famille d'oxydes ternaires de niobium, A3M8O21 à structure en cages. J SOLID STATE CHEM 1976. [DOI: 10.1016/0022-4596(76)90173-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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