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Solid emission color tuning of organic charge transfer cocrystals based on planar π-conjugated donors and TCNB
Southeast Univ, Natl Demonstrat Ctr Expt Biomed Engn Educ, State Key Lab Bioelect, Nanjing, Jiangsu, Peoples R China.
Southeast Univ, Natl Demonstrat Ctr Expt Biomed Engn Educ, State Key Lab Bioelect, Nanjing, Jiangsu, Peoples R China.
Southeast Univ, Natl Demonstrat Ctr Expt Biomed Engn Educ, State Key Lab Bioelect, Nanjing, Jiangsu, Peoples R China.
Southeast Univ, Natl Demonstrat Ctr Expt Biomed Engn Educ, State Key Lab Bioelect, Nanjing, Jiangsu, Peoples R China; Hunan Univ Technol, Hunan Key Lab Biomed Nanomat & Devices, Econ Forest Cultivat & Utilizat Collaborat Innova, Zhuzhou, Peoples R China.
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2019 (English)In: Journal of Solid State Chemistry, ISSN 0022-4596, E-ISSN 1095-726X, Vol. 272, p. 96-101Article in journal (Refereed) Published
Abstract [en]

Two luminescent Charge Transfer (CT) cocrystals involving planar phenanthrene derivatives namely, formyl phenanthrene (FP) and acetyl phenanthrene (AP) as donors (D) and 1,2,4,5-tetracyanobenzene (TCNB) as an acceptor (A) building block, are formed by molecular self-assembly. Detailed structural and spectroscopic measurements elucidated the mixed stack sequence DADAD in the CT cocrystals. The solid supramolecular architecture for both the cocrystals forms 2D sheet, supported by the extended network of C-H center dot center dot center dot O, and C-H center dot center dot center dot N hydrogen bonds as evidenced by the crystallographic observation. Interestingly, the two cocrystals display tunable emissions compared to the blue emissions of donor compounds, which correlate with the formation of excited CT state between the donor and acceptor motifs as a result of mixed stack orientation. The nature of the CT interactions in the two cocrystals was further explored by applying density functional theoretical (DFT) studies. Such a supramolecular cocrystal approach provides a facile platform towards the design of new luminescent two component CT complexes with desired functionalities.

Place, publisher, year, edition, pages
2019. Vol. 272, p. 96-101
Keywords [en]
Phenanthrene derivatives, Mixed stacking, Hirshfeld surface analysis, Photophysical properties, density functional, calculations
National Category
Other Health Sciences
Identifiers
URN: urn:nbn:se:uu:diva-382987DOI: 10.1016/j.jssc.2019.02.005ISI: 000464772500013OAI: oai:DiVA.org:uu-382987DiVA, id: diva2:1315223
Available from: 2019-05-13 Created: 2019-05-13 Last updated: 2019-05-13Bibliographically approved

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Sun, Weiwei

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