Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan.
PG and Research Department of Chemistry, V. O. Chidambaram College, Tuticorin - 628 008, Tamil Nadu, India.
Dalton Trans. 2023 Feb 14;52(7):1939-1949. doi: 10.1039/d2dt03408e.
The self-assembly of tetrarhenium metallacycles [{Re(CO)}(μ-dhaq)(μ-N-N)] (3a, N-N = 1,3-bis(1-butylbenzimidazol-2-yl)benzene; 3b, N-N = 1,3-bis(1-octylbenzimidazol-2-yl)benzene), (H-dhaq = 1,4-dihydroxy-9,10-anthraquinone) and [{Re(CO)}(μ-thaq)(μ-N-N)] (4, N-N = 1,3-bis(1-butylbenzimidazol-2-yl)benzene), (H-thaq = 1,2,4-trihydroxy-9,10-anthraquinone) under solvothermal conditions is described. The metallacycles 3a,b and 4 underwent aggregation-induced emission enhancement (AIEE) in THF upon the incremental addition of water. TEM images revealed that metallacycle 3a in a 60% aqueous THF solution formed rectangular aggregates with a wide size distribution, while a 90% aqueous THF solution resulted in the formation of a mixture of nanorods and amorphous aggregates due to rapid and abrupt aggregation. UV-vis and emission spectral profiles supported the formation of nanoaggregates of metallacycles 3a,b and 4 upon the gradual addition of water to a THF solution containing metallacycles. Further studies indicated that these nanoaggregates were excellent probes for the sensitive and selective detection of nitro group containing picric acid (PA) derivatives as well as antibiotics.
在溶剂热条件下，描述了四铼金属环 [{Re(CO)}（μ-dhaq）（μ-N-N)]（3a，N-N=1,3-双（1-丁基苯并咪唑-2-基）苯；3b，N-N=1,3-双（1-辛基苯并咪唑-2-基）苯）]，（H-dhaq=1,4-二羟基-9,10-蒽醌）和[{Re(CO)}（μ-thaq）（μ-N-N)]（4，N-N=1,3-双（1-丁基苯并咪唑-2-基）苯）]，（H-thaq=1,2,4-三羟基-9,10-蒽醌）的自组装。金属环 3a，b 和 4 在 THF 中随着水的逐渐加入，经历了聚集诱导发射增强（AIEE）。TEM 图像显示，金属环 3a 在 60%的含水 THF 溶液中形成了具有宽尺寸分布的矩形聚集体，而在 90%的含水 THF 溶液中，由于快速和突然的聚集，形成了纳米棒和无定形聚集体的混合物。紫外可见光谱和发射光谱轮廓支持了金属环 3a，b 和 4 的纳米聚集体的形成，方法是将水逐渐加入到含有金属环的 THF 溶液中。进一步的研究表明，这些纳米聚集体是检测含有硝基的苦味酸（PA）衍生物以及抗生素的灵敏和选择性探针的优良探针。
