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A thorough understanding of the nonlinear optical properties of BODIPY/carborane/diketopyrrolopyrrole hybrid chromophores: module contribution, linear combination, one-/two-dimensional difference and carborane's arrangement

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Abstract

In an attempt to enrich the understanding of essential structure–nonlinear optical (NLO) property correlations in multi-component photoactive boron dipyrromethene/closo-dodecaborane/diketopyrrolopyrrole (BOD/Cp/DPP) hybrid chromophores, three basic modules, three dyads, and five triads were systematically designed and comparatively investigated. Herein, the geometric and electronic structures, electronic absorption spectra, polarizabilities (αave) and first hyperpolarizabilities (βtot) were calculated using density functional theory. It was found that the absorption spectrum and αave results of our current chromophores were highly modular, which can be efficiently deduced from the corresponding building blocks. The βtot values were determined by the BOD module because of their dominant polarization mechanisms, rather than a general dependence on the molecular size/volume. Furthermore, we presented a comprehensive assessment of the evolution of the structure and photophysical (NLO) properties upon linear combination of basic functional modules, one-/two-dimensional geometric differences and carborane's differently substituted position deriving from the pristine rod-like BOD–Cp–DPP platform. The take home messages suggest that the quadratic NLO behaviors can be rationally tuned by the minor modifications in the structure. Overall, we believe that the proposed chromophores and even more the reasoning for their design/recognition will be helpful for the exploration of more efficient NLO materials than those currently available.

Graphical abstract: A thorough understanding of the nonlinear optical properties of BODIPY/carborane/diketopyrrolopyrrole hybrid chromophores: module contribution, linear combination, one-/two-dimensional difference and carborane's arrangement

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Publication details

The article was received on 01 Apr 2019, accepted on 09 May 2019 and first published on 11 May 2019


Article type: Paper
DOI: 10.1039/C9TC01750J
J. Mater. Chem. C, 2019, Advance Article

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    A thorough understanding of the nonlinear optical properties of BODIPY/carborane/diketopyrrolopyrrole hybrid chromophores: module contribution, linear combination, one-/two-dimensional difference and carborane's arrangement

    H. Wang, J. Ye, Y. Zhang, Y. Zhao and Y. Qiu, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C9TC01750J

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