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Volumn 7, Issue 2, 2001, Pages 436-446

Stirring effects on the spontaneous formation of chirality in the homoassociation of diprotonated meso-tetraphenylsulfonato porphyrins

Author keywords

Aggregation; Asymmetric amplification; Chirality; Circular dichroism; Exciton coupling; Porphyrinoids

Indexed keywords

AMPHOLYTE; PORPHYRIN DERIVATIVE; SULFONIC ACID DERIVATIVE; TETRAKIS(TETRAPHENYLSULFONATO)PORPHYRIN; UNCLASSIFIED DRUG;

EID: 0035910578     PISSN: 09476539     EISSN: None     Source Type: Journal    
DOI: 10.1002/1521-3765(20010119)7:2<436::AID-CHEM436>3.0.CO;2-I     Document Type: Article
Times cited : (133)

References (70)
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    • note
    • The homoassociates of all the porphyrins tested gave very similar absorption spectra (see ref. [8b, 9]). For simplification, only the approximate wavelengths are given in the text (± 1 nm for the B bands and ±5 nm for the Q band).
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    • 4) we detected induced CD for the monomer transition. This induction disappeared following dilution and rotary evaporation, but it was detected again when the solutions were left to stand.
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    • Although, the differential scattering at angles near to 0°, i.e., the light reaching the detector, is normally weak, the huge resonance-enhanced light scattering (RLS), which these diprotonated porphyrins show, justifies the intensity of the detected contributions: see ref. [8b]. a) R. F. Pasternak, C. Bustamante, P. J. Collings, A. Giannetto, E. J. Gibbs, J. Am. Chem Soc. 1993, 115, 5393-5399;
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    • y splitting for the 1-to-3 interaction through the corner: a red-shift and a blue-shift that are of the same order and of twice the absolute value of the red-shift of the 180° 1-to-3 interaction. In the UV/Vis spectrum this would result in a broadening of the band towards 510 nm (see Figure 9).
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    • Simple structural models that imply packing in two non-perpendicular directions show that different signs on the torsion angles increase the steric hindrance.
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    • note
    • The homoassociates do not pass 0.65 μm pore membrane filters. In some cases, under sufficient pressure, diprotonated porphyrin can pass the membranes. Observation of the UV/Vis spectra of the filtrate shows that the filter is crossed by the monomer or small aggregates, which regenerate larger homoassociates in the filtrate solution.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.