Shen, C. and Srebro-Hooper, M. and Jean, M. and Vanthuyne, N. and Toupet, L. and Williams, J. A. G. and Torres, A. R. and Riives, A. J. and Muller, G. and Autschbach, J. and Crassous, J. (2017) 'Synthesis and chiroptical properties of hexa-, octa-, and decaazaborahelicenes : influence of helicene size and of the number of boron atoms.', Chemistry : a European journal., 23 (2). pp. 407-418.
Four members of a new class of cycloborylated hexa-, octa-, and deca-helicenes (1 a–d) have been prepared in enantiopure form, along with two cycloplatinated deca-helicenes (1 d′, 1 d1), further extending the family of cycloplatinated hexa- and octa-helicenes reported previously. The azabora[n]helicenes display intense electronic circular dichroism and large optical rotations; the dependence of the optical activity on the size of the helix (n=6, 8, 10) and the number of boron atoms (1 or 2) has been examined in detail both experimentally and theoretically. The photophysical properties (nonpolarized and circularly polarized luminescence) of these new fluorescent organic helicenes have been measured and compared with the corresponding organometallic phosphorescent cycloplatinated derivatives (1 a1–d1).
|Full text:||(AM) Accepted Manuscript|
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|Publisher Web site:||https://doi.org/10.1002/chem.201604398|
|Publisher statement:||This is the peer reviewed version of the following article: C. Shen, M. Srebro-Hooper, M. Jean, N. Vanthuyne, L. Toupet, J. A. G. Williams, A. R. Torres, A. J. Riives, G. Muller, J. Autschbach, J. Crassous, Chemistry - A European Journal 2017, 23(2): 407-418, which has been published in final form at https://doi.org/10.1002/chem.201604398. This article may be used for non-commercial purposes in accordance With Wiley-VCH Terms and Conditions for self-archiving.|
|Date accepted:||18 October 2016|
|Date deposited:||12 May 2017|
|Date of first online publication:||01 December 2016|
|Date first made open access:||01 December 2017|
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