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Regulating structural dimensionality and emission colors by organic conjugation between SmIII at a fixed distance

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Abstract

The conjugation of bridging bis(diphenylphosphine oxide) alkane or arene ligands was found to control the structural dimensionality and the emission color of complexes from reactions with SmIII(hfac)3(H2O)2 (hfac = hexafluoroacetylacetonato) while retaining the Sm⋯Sm distances. Bis(diphenylphosphine oxide)-1,4-butane (L1) affords a one-dimensional (1D) ribbon {Sm(hfac)3(L1)} (1) that emits red color, while bis(diphenyl-phosphinoyl)-1,4-benzene (L2) results in a two-dimensional (2D) network {Sm(hfac)2(CF3COO)(L2)3} (2) and near-white emission, but bis(diphenyl-phosphinoyl)-9,10-anthracene (L3) forms a zero-dimensional (0D) cyclic structure {Sm(hfac)3(L3)}2 (3) with strong π⋯π interactions that emit green color. Noticeably, the conjugation change is accompanied by a configurational change of coordination from trans for 1 and 2 to cis for 3. The color change is associated with the superposition of ligand and Sm based electronic band energies and their intensities. Such white light emission by a single compound having contributions from different building components is quite rare.

Graphical abstract: Regulating structural dimensionality and emission colors by organic conjugation between SmIII at a fixed distance

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Publication details

The article was received on 19 Jan 2018, accepted on 19 Mar 2018 and first published on 20 Mar 2018


Article type: Paper
DOI: 10.1039/C8DT00238J
Citation: Dalton Trans., 2018, Advance Article
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    Regulating structural dimensionality and emission colors by organic conjugation between SmIII at a fixed distance

    H. Xu, J. Wang, X. Chen, P. Xu, K. Xiong, D. Guan, J. Deng, Z. Deng, M. Kurmoo and M. Zeng, Dalton Trans., 2018, Advance Article , DOI: 10.1039/C8DT00238J

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