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Fluorescence quenching of para-substitutedstyrenes by tetramethylethylene. Correlationanalysis of the quenching coefficient KSV and thequenching rate constant k_q by the dual-parameter equation with polar and spin-delocalization substituent constants

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Chinese Journal of Chemistry 1997年第5期15卷 395-404页

作者： ZHANG, Yu-Huang JIANG, Bin JIANG, Xi-KuiShanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

The fluorescence quenching coefficient (Ksv) and the quenching rate constant kq of ten para-substituted styrenes (1-Ys) have been measured and correlation-analyzed by both the dual-parameter equation (Eq. 1) with (ρxσx+ρ'σ') and the single-parameter equation (Eq. 2) with ρxσx. Ex-cellent results have been obtained for the correlation of KSV against (ρxσmb+ρ'σ'JJ) or (ρxσ+ +ρ'σ'JJ). Our results suggest that, possibly, there might be no need to use excited-state substituent constant for the fluorecence quenching process of excited states of styrenes.

关键词： Fluorescence quenching correlation analysis styrenes dual-parameter equation

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Correlation Analysis of the Fluorescence Data of Some Benzaldehyde Derivatives by the dual-parameter equation

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Chinese Chemical Letters 1998年第4期9卷 385-387页

作者： Ding, WFX Jiang, XK Acad Sinica Shanghai Inst Organ Chem Shanghai 200032 Peoples R China

The fluorescence emission wavelength [lambda(max(em))] values of three types of benzaldehyde derivatives, namely, ethylene acetals (1-Ys), 4-nitrophenylhydrazones (2-Ys) and phenylhydrazones (3-Ys), have been measured. Correlation analyses by the dual-parameter equation show that the lambda(max(em)) values of 1-Ys are mainly affected by the spin-delocalization effects of the substituents, while those of 2-Ys are mainly affected by the polar effects. However, those of 3-Ys are independent of the substituents.

关键词： correlation analysis dual-parameter equation fluorescence spectral data benzaldehyde ethylene acetals phenylhydrazones and 4-nitrophenylhydrazones

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dual-parameter Correlation Analysis of the Fluorescence Data of 1-Methyl-2-formyl-5-substituted Pyrrole(4-nitrophenyl)hydrazones

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Chinese Chemical Letters 1999年第6期10卷 499-502页

作者： Roderick Hat Ying HE Xi Kui JIANG(Shanghai Institute of organic Chemistry,354 Feng－Lin Lu．Shanghai 200032) Shanghai Inst Organ Chem Shanghai 200032 Peoples R China

By using 1-methyl-2-formyl-5 -Y-substituted pyrrole (4-nitrophenyl)hydrazones as a model for nitrogen-containing heterocyclic aromatic compounds, the emission wavelength [lambda(max(em))] values df their fluorescence spectra have been measured. Correlation results show that the Delta E-em values are mainly affected by polar effects, but spin-delocalizatin effects also exist.

关键词： fluorescence spectra correlation analysis dual-parameter equation spin-delocalization effect polar effect 1-methyl-2-formyl-5-Y-substituted pyrrole (4-nitrophenyl)hydrazones

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