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)(CC–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