摘要
Multichromophoric architectures with wellorganized chromophoric arrangements are of vital importance to gain insights into interchromophoric interactions.Herein,we report a novel heteroleptic self-assembly strategy and construct three achiral and one chiral sandwich-like heterochromophore complexes(Zn_(4)L^(G)L^(A-C)_(2)and Zn_(4)L_(G)L^(D)_(2)).Possible dynamic products,including homoleptic oligomers and isomers,are eliminated,producing achiral complexes with exceptional purity.Isomers are observed in chiral complexes due to the flexible geometry of LD.Perfectly aligned chromophore arrangements with precise spacing and orientations are evidenced by single-crystal X-ray diffraction.The distinct segments in the ligands lead to different interchromophoric interactions.Impressively,energy transfer and tunable emission,including white-light emission,are achieved for Zn_(4)L^(G)L^(A)_(2)and Zn_(4)L^(G)L^(B)_(2).In addition,chirality transfer is observed for Zn_(4)L_(G)L^(D)_(2),due to conformational restriction from chiral LD,leading to chiral rotational conformations of tetraphenylethylene moiety in LG.
基金
the National Natural Science Foundation of China(22271116,22071079 for M.W.)
the fellowship of the China Postdoctoral Science Foundation(2021M701383 for J.S.)
the Natural Science Foundation of Jilin Province(20230101027JC)
the staff at the BL17B1 beamline of the National Facility for Protein Science in Shanghai(NFPS),the Shanghai Advanced Research Institute,and CAS for providing technical support in X-ray diffraction data collection and analysis.
