The Sonogashira–Hagihara coupling polymerization of a D-hydroxyphenylglycine-derived diiodoarylene monomer and platinum-containing diethynylphenylene monomers with various substituents, HCC–C₆H₄–CC–Pt(PR₃)₂–CC–C₆H₄–CCH, 1: R = C₄H₉, 2: R = C₈H₁₇, 3: R = cyclohexyl, 4: R = phenyl, and 5: R = 4-methoxyphenyl, gave the corresponding polymers 1′–5′ with number-average molecular weights of 4600–22 000. The polymers were soluble in CHCl₃, CH₂Cl₂, THF and DMF. CD/UV–vis spectroscopic analysis and dynamic light scattering measurements revealed that 1′–5′ formed chirally regulated unimolecular structures in THF/toluene mixtures, while formed chiral aggregates in THF/MeOH mixtures. The conjugation of the polymer main chain was longer for monomers with aryl groups bonded to P compared to monomers with alkyl groups bonded to P. The relationship between the HOMO–LUMO gaps and phosphine ligands was reasonably explained by DFT calculations. The polymers exhibited photoluminescence with quantum yields ranging from 0.003% to 0.9%. The photoluminescence intensity was controlled by changing the phosphine substituents. The thermal stability of the polymers increased and the refractive index decreased as the alkyl chain length of the phosphine ligand was increased.

中文翻译：

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膦配体对含铂共轭聚合物的光吸收/发射性能的影响†

一的的Sonogashira-萩原偶联聚合d -hydroxyphenylglycine衍生diiodoarylene单体和具有各种取代基的含铂diethynylphenylene单体，HC C-C ₆ H ^ ₄ -C C-的Pt（PR ₃）₂ -C C-C ₆ H ^ ₄ -C CH，1：R = C ^ ₄ ħ ₉，2：R = C ^ ₈ ħ ₁₇，3：R =环己基，4：R =苯基，和5：R = 4-甲氧基苯基，得到相应的聚合物1,1'- 5′数均分子量为4600–22000。该聚合物可溶于CHCl ₃，CH ₂ Cl ₂，THF和DMF。CD / UV-vis光谱分析和动态光散射测量表明1'-5'在THF /甲苯混合物中形成手性调节的单分子结构，而在THF / MeOH混合物中形成手性聚集体。与具有与P结合的烷基的单体相比，具有与P结合的芳基的单体的聚合物主链的共轭更长。通过DFT计算合理地解释了HOMO-LUMO间隙与膦配体之间的关系。聚合物表现出光致发光，量子产率为0.003％至0.9％。通过改变膦取代基来控制光致发光强度。随着膦配体的烷基链长度的增加，聚合物的热稳定性提高，折射率降低。