Cyclometalated Platinum(II) Complexes of 1,3-Bis(1‑<i>n</i>‑butylpyrazol-3-yl)benzenes: Synthesis, Characterization, Electrochemical, Photophysical, and Gelation Behavior Studies Yeye Ai Yongguang Li Huiqing Ma Cheng-Yong Su Vivian Wing-Wah Yam 10.1021/acs.inorgchem.6b02033.s001 https://acs.figshare.com/articles/journal_contribution/Cyclometalated_Platinum_II_Complexes_of_1_3-Bis_1_i_n_i_butylpyrazol-3-yl_benzenes_Synthesis_Characterization_Electrochemical_Photophysical_and_Gelation_Behavior_Studies/4189188 A new series of cyclometalated platinum­(II) complexes of N^C^N ligands, where N^C^N = 1,3-bis­(1-<i>n</i>-alkylpyrazol-3-yl)­benzene (bpzb), namely, [Pt­(bpzb)­Cl] (<b>1</b> and <b>2</b>) and [Pt­(bpzb)­(CC–R)] (<b>3</b>–<b>10</b>) (R = C<sub>6</sub>H<sub>5</sub>, C<sub>6</sub>H<sub>4</sub>–OCH<sub>3</sub>-<i>p</i>, C<sub>6</sub>H<sub>4</sub>–NO<sub>2</sub>-<i>p</i>, C<sub>6</sub>H<sub>4</sub>–NH<sub>2</sub>-<i>p</i>, 4-cholesteryl phenyl carbamate, and cholesteryl methylcarbamate) were synthesized and characterized. Their electrochemical and photophysical properties were investigated. Two of the platinum­(II) complexes were also structurally characterized by X-ray crystallography, and short intermolecular C–H···Pt contacts were observed. Vibronic-structured emission bands originating from triplet IL (<sup>3</sup>IL) excited states of the bpzb ligands with mixing of some <sup>3</sup>MLCT [dπ­(Pt)→π*­(bpzb)] character were observed in solution state. Interestingly, complex <b>5</b> shows a low-energy emission that is derived from the involvement of the <i>p</i>-nitrophenylethynyl ligand. Complex <b>9</b> with hydrophobic cholesteryl 4-ethynylphenyl carbamate ligand was found to form stable metallogels in several organic solvents, which are responsive to mechanical sonication and thermal stimuli and show circular dichroism activity. 2016-11-02 13:04:09 cholesteryl 4- ethynylphenyl carbamate ligand C 6 H 5 triplet IL dichroism activity alkylpyrazol -3-yl cholesteryl methylcarbamate OCH Pt NH Complex 9 Vibronic-structured emission bands 3 IL photophysical properties solution state Gelation Behavior Studies bpzb ligands X-ray crystallography 4- cholesteryl phenyl carbamate nitrophenylethynyl ligand complex 3 MLCT low-energy emission