Positive heterotropic cooperativity for selective guest binding via electronic communications through a fused zinc porphyrin array.

Positive heterotropic cooperativity for selective guest binding via electronic communications through a fused zinc porphyrin array. Research Abstract Details 

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Positive heterotropic cooperativity for selective guest binding via electronic communications through a fused zinc porphyrin array. Abstract Text:

Hiroshi Sato,Kentaro Tashiro,Hideyuki Shinmori,Atsuhiro Osuka,Yasujiro Murata,Koichi Komatsu,Takuzo Aida,

Upon binding with C60 and diamines, such as 4,4'-bipyridine (bpy) and N,N,N',N'-tetramethylhexane-1,6-diamine (TMHDA), cyclic host 1 possessing two electronically coupled binding sites displays negative homotropic cooperativity and positive heterotropic cooperativity, and their ternary mixtures preferentially form inclusion complexes with hetero-guest pairs 1 supersetC60*bpy and 1 supersetC60*TMHDA under appropriate conditions. Spectroscopic titration profiles in toluene at 20 degrees C demonstrated that the association constants (Kassoc) of C60 with monodiamine complexes 1 supersetbpy (2.8 x 105 M-1) and 1 supersetTMHDA (1.5 x 105 M-1) are 8.5 and 4.5 times greater than that of C60 with guest-free 1 (3.3 x 104 M-1), respectively. On the other hand, mono-C60 complex 1 supersetC60 was 6.1 times more accessible than guest-free 1 toward TMHDA. Absorption spectroscopy in the absence of 1 indicated no direct interaction between C60 and diamines.

Positive heterotropic cooperativity for selective guest binding via electronic communications through a fused zinc porphyrin array. Publishing Authors By Initials

H Sato,K Tashiro,H Shinmori,A Osuka,Y Murata,K Komatsu,T Aida,

For similar inorganic chemicals: elements: metals, heavy: zinc research abstracts see: inorganic chemicals: elements: metals, heavy: zinc research

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Positive heterotropic cooperativity for selective guest binding via electronic communications through a fused zinc porphyrin array. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of the American Chemical Society

VOLUME: 127

Page Numbers: 13086-7

Journal Abbreviation: J. Am. Chem. Soc.

ISSN: 0002-7863

DAY: 28

MONTH: Sep

YEAR: 2005

Positive heterotropic cooperativity for selective guest binding via electronic communications through a fused zinc porphyrin array. Information

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LANGUAGE: eng

NlmUniqueID: 7503056

Positive heterotropic cooperativity for selective guest binding via electronic communications through a fused zinc porphyrin array. Keywords Mesh Terms:

KEYWORDS: Zinc

MESH TERMS: chemistry

Chemical & Substance for Abstract: Positive heterotropic cooperativity for selective guest binding via electronic communications through a fused zinc porphyrin array. Information

Substance Name: Zinc

Registry Number: 7440-66-6

Grant and Affiliation Information for Positive heterotropic cooperativity for selective guest binding via electronic communications through a fused zinc porphyrin array.

AFFILIATION: Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan.

Country: United States

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MEDLINETA: J Am Chem Soc

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