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.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
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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.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
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