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Volumn 46, Issue 20, 2007, Pages 3693-3696

Molecular transmission: Controlling the twist sense of a helical polymer with a single light-driven molecular motor

Author keywords

Chirality; Helical structures; Photochromism; Polyisocyanates

Indexed keywords

HELICAL STRUCTURES; MOLECULAR TRANSMISSION; POLYISOCYANATES; POLYMER BACKBONE;

EID: 34250832094     PISSN: 14337851     EISSN: None     Source Type: Journal    
DOI: 10.1002/anie.200604941     Document Type: Article
Times cited : (183)

References (53)
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    • For chiral anionic initiators affording optically active polyisocyanates, see: Y. Okamoto, M. Matsuda, T. Nakano, E. Yashima, Polym. J. 1993, 25, 391-396.
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    • See the Supporting Information
    • See the Supporting Information.
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    • A photostationary state (PSS) mixture of (2′S)-(M)- trans-2-PHIC and (2′S)-(P)-cis-2-PHIC is obtained. For 1 the PSS ratio was determined at (2′S)-(M) -trans-1/(2′S)-(P)-cis-1 = 21:79 (see the Supporting Information); for 2 a similar PSS mixture is anticipated.
    • A photostationary state (PSS) mixture of (2′S)-(M)- trans-2-PHIC and (2′S)-(P)-cis-2-PHIC is obtained. For 1 the PSS ratio was determined at (2′S)-(M) -trans-1/(2′S)-(P)-cis-1 = 21:79 (see the Supporting Information); for 2 a similar PSS mixture is anticipated.
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    • Poly((R)-2,6-dimethylheptylisocyanate), which is known to exist as an M helix (see Ref. [8a]), has the opposite CD absorption (see Ref. [9]).
    • Poly((R)-2,6-dimethylheptylisocyanate), which is known to exist as an M helix (see Ref. [8a]), has the opposite CD absorption (see Ref. [9]).
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    • A mixture of (2′S)-(M)-trans-2-PHIC and (2′S)-(M)-cis-2-PHIC is obtained, the ratio of which is identical to that of the PSS mixture obtained after step 1.
    • A mixture of (2′S)-(M)-trans-2-PHIC and (2′S)-(M)-cis-2-PHIC is obtained, the ratio of which is identical to that of the PSS mixture obtained after step 1.
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    • A PSS mixture of (2′S)-(M)-cis-2-PHIC and (2′S)-(P)-trans-2-PHIC is obtained. For 1 the PSS ratio was determined at (2′S)-(M)-cis-1/ (2′S)-(P)-trans-1 = 21:79 (see the Supporting Information); for 2 a similar PSS mixture is anticipated.
    • A PSS mixture of (2′S)-(M)-cis-2-PHIC and (2′S)-(P)-trans-2-PHIC is obtained. For 1 the PSS ratio was determined at (2′S)-(M)-cis-1/ (2′S)-(P)-trans-1 = 21:79 (see the Supporting Information); for 2 a similar PSS mixture is anticipated.
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    • Helix reversals will rarely occur along the relatively short polymer chains (in hydrocarbon solvents at 20°C, the population of helix reversals has been estimated at one per 600 monomelic units, see Ref. [8b]).
    • Helix reversals will rarely occur along the relatively short polymer chains (in hydrocarbon solvents at 20°C, the population of helix reversals has been estimated at one per 600 monomelic units, see Ref. [8b]).


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.