28036-07-9Relevant academic research and scientific papers
Efficient energy and electron transfer between donor and acceptor chromophores in aluminophosphate hybrid materials
Lo, Chih-Yuan,Chen, Chih-Hsien,Tsai, Tim W. T.,Zhang, Long,Lim, Tsong-Shin,Fann, Wunshain,Chan, Jerry C. C.,Luh, Tien-Yau
experimental part, p. 539 - 546 (2011/04/22)
The first organic-inorganic hybrid materials (OIHMs) having one or a combination of two chromophores in different ratios are obtained from the aryl phosphonic acid and aluminum lactate via sol gel process. The structures of these OIHMs are analyzed by the 27Al and 31P NMR. The fluorescence resonance energy transfer (FRET) as well as photoinduced electron transfer (PET) between donor and acceptor chromophores in these hybrid materials have been investigated and the efficiencies can be up to 97 and 93%, respectively.
Sulfonated microporous organic-inorganic hybrids as strong bronsted acids
Wang, Zhike,Heising, Joy M.,Clearfield, Abraham
, p. 10375 - 10383 (2007/10/03)
It has been discovered that the use of excess zirconium in reactions with 4,4′-biphenyl and 4,4′-terphenylbis(phosphonic acid) in DMSO or DMSO-ethanol mixtures produces microporous inorganic-organic hybrids. Surface areas of 400 m2/g and pore sizes in the range of 10-20 A in diameter are routinely obtained. These materials are readily sulfonated with SO3 under pressure to yield strong Bronsted acids. The acid strength, measured by 13C NMR shifts of acetone and cyclopentanone in contact with the sulfonates, indicates an acidity close to that of 100% H 2SO4. Condensation and cracking reactions were obtained for both ketones under mild conditions. A working hypothesis is presented to account for the high surface area and microporosity. The combination of high surface areas and pore dimensions that are between those of zeolites and mesoporous silicas commends these materials for applications in separations, ion exchange, and catalysis.
