Comparative photophysical properties of free-base, bis-Zn(II), bis-Cu(II), and bis-Co(II) doubly N-confused hexaphyrins (1.1.1.1.1.1)

Article Abstract:

The photophysics of a series of bis-metal doubly N-confused hexaphyrins (1.1.1.1.1.1) was investigated using various fluorescent techniques and geometry-optimized ab inito calculations. Bis-Zn(II) and free-base doubly N-confused hexaphyrins show [pi]-[pi*] transitions around a hexaphyrin ring at the B3LYP/6-3IG level and the absorption spectra of bis-Cu(II) and bis-Co(II) doubly N-confused hexaphyrins are relatively broad due to large couplings between the metal d-orbitals and [pi]-electrons of the hexaphyrin rings.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Cobalt Compounds, Optical properties, Copper compounds, Zinc compounds

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Role of deliquescence lowering in enhancing chemical reactivity in physical mixtures

Article Abstract:

The effect of deliquescence lowering on chemical reactivity is evaluated and sucrose, citric acid and their physical mixtures are characterized using vapor sorption analysis to determine critical relative humidities (R[H.sub.0S]) and a lower critical relative humidity (R[H.sub.0mix]). The mixtures of deliquescent solids have showed increased water sorption at lower RHs, which caused solid dissociation and subsequently led to an increase in the chemical reactivity.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Citric Acid, Raw cane sugar, Sucrose, Sugarcane Mills, Chemical properties

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