Development of Polyene-Bridged Hybrid Rhodamine Fluorophores for High-Resolution NIR-II Imaging Yibing Shi, Wei Yuan, Qingyun Liu, Mengya Kong, Zhenhua Li, Wei Feng, Ke Hu,* and Fuyou Li*  DOI: 10.1021/acsmaterialslett.9b00265  ACS Materials Lett. 2019, 1, 418−424