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Volumn 126, Issue 29, 2004, Pages 9042-9053

Two-dimensional crystallization: Self-assembly, pseudopolymorphism, and symmetry-independent molecules

Author keywords

[No Author keywords available]

Indexed keywords

BENZENE; COMPUTER SIMULATION; CRYSTALLIZATION; MICROBIOLOGY; MONOLAYERS; SCANNING TUNNELING MICROSCOPY;

EID: 3242812132     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja0493446     Document Type: Article
Times cited : (84)

References (89)
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    • For recent reviews of the challenges of three-dimensional crystal structure prediction, see: Desiraju, G. R. Nat. Mater. 2002, 1, 77-79.
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    • Desiraju, G.R.1
  • 24
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    • Correlations between the existence of strong hydrogen bonds in a structure and Z′ & 1 have been suggested: (a) Gavezzotti, A.; Filippini, G. J. Phys. Chem. 1994, 98, 4831-4837.
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    • note
    • The 1,3-diester-substituted benzenes are described as "odd esters" or "even esters" on the basis of the parity of the number of carbons in each alkyl chain.
  • 69
    • 3242773806 scopus 로고    scopus 로고
    • note
    • 2).
  • 70
    • 0033531678 scopus 로고    scopus 로고
    • Although numerous definitions have been offered for the term pseudopolymorphism, as reviewed by Bernstein, we use the definition from Nangia, A.; Desiraju, G. R. Chem. Commun. 1999, 605-606 that refers to "crystalline forms that differ in the nature or stoichiometry of included solvent molecules". Applying this definition to two-dimensions implies that monolayers of a given compound that differ in stoichiometry with the surface are pseudopolymorphs.
    • (1999) Chem. Commun. , pp. 605-606
    • Nangia, A.1    Desiraju, G.R.2
  • 72
    • 3242756795 scopus 로고    scopus 로고
    • note
    • In this context, it is interesting to note that a smooth interface surrounding a thermodynamically unstable domain prolongs its existence.
  • 75
    • 3242808242 scopus 로고    scopus 로고
    • A similar difference in the strength of hydrogen bonds to amines from ketone and ester donors has been observed: Ziao, N.; Laurence, C.; Le Questel, J. Y. CrystEngComm 2002, 4, 326-335.
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    • Ziao, N.1    Laurence, C.2    Le Questel, J.Y.3
  • 76
    • 0000560385 scopus 로고
    • The difficulty in controlling and reproducing the formation of some metastable polymorphs is a widely recognized phenomenon in the field of three-dimensional crystallization: Dunitz, J. D.; Bernstein, J. Acc. Chem. Res. 1995, 28, 193-200.
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    • Dunitz, J.D.1    Bernstein, J.2
  • 77
    • 3242809059 scopus 로고    scopus 로고
    • note
    • It might have been expected that the requirement of adsorption to the surface would add to frustration of close packing, making Z′ > 1 more common in two-dimensional crystals. Surface reconstructions involving ionic or covalent crystals often display extremely large numbers of inequivalent sites. However, experiments carried out on physisorbed monolayers reveal that the additional restriction of two-dimensionality due to the surface does not add substantially to the appearance of Z′ > 1, as is apparent from the comparison of the statistics of two- and three-dimensional crystals. This may be observed because of the relatively weak and nondirectional interactions involved with these physisorbed monolayers.
  • 79
    • 0037034414 scopus 로고    scopus 로고
    • A few examples of Z′ > 1 in two-dimensional crystals have been observed by other preparation methods. An example of Z′ = 2 can be found in vapor-formed two-dimensional crystals of nickel(II) octaethylporphyrin: Scudiero, L.; Barlow, D. E.; Hipps, K. W. J. Phys. Chem. B 2002, 106, 996-1003.
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    • Scudiero, L.1    Barlow, D.E.2    Hipps, K.W.3
  • 80
    • 0035905621 scopus 로고    scopus 로고
    • An example of Z′ > 2 can be found in solvent-evaporated two-dimensional crystals of alkyl-substituted triphenylenes: Wu, P.; Zeng, Q. D.; Xu, S. D.; Wang, C.; Yin, S. X.; Bai, C. L. ChemPhysChem 2001, 2, 750-754. Monolayers formed by these techniques have fewer opportunities to reorganize as compared to monolayers remaining in solution for extended periods, and thus may be kinetically favored phases, while monolayers imaged at the solution-solid interface are more likely to be the thermodynamically favored structure.
    • (2001) ChemPhysChem , vol.2 , pp. 750-754
    • Wu, P.1    Zeng, Q.D.2    Xu, S.D.3    Wang, C.4    Yin, S.X.5    Bai, C.L.6
  • 81
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    • Liquid crystals of alkylcyanobiphenyls form multiple asymmetric molecules on graphite that can be observed by STM. However, the observed layer is not a two-dimensional crystal because it is part of a structure with three-dimensional order. Frommer, J. Angew. Chem., Int. Ed. Engl. 1992, 31, 1298-1328.
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  • 84
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    • Among highly polymorphic organic compounds that have been structurally characterized, carbamazepine is the only one where the change between the four polymorphs is related primarily to weak hydrogen bonding. Grzesiak, A. L.; Lang, M.; Kim, K.; Matzger, A. J. J. Pharm. Sci. 2003, 92, 2260-2271.
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    • For a novel mechanism of concomitant polymorphism in three-dimensions, see: Yu, L. J. Am. Chem. Soc. 2003, 125, 6380-6381.
    • (2003) J. Am. Chem. Soc. , vol.125 , pp. 6380-6381
    • Yu, L.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.