期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 54, 期 21, 页码 6181-6185出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201501349
关键词
antiaromaticity; cycloaddition; density functional calculations; metallacycles; osmium
资金
- 973 Program [2012CB821600, 2014CB744503]
- NSFC [21332002, 21172184, 81422023]
- Program for New Century Excellent Talents in University [NCET-13-0511, NCET-13-0502]
Antiaromatic species are substantially less thermodynamically stable than aromatic moieties. Herein, we report the stabilization of two classical antiaromatic frameworks, cyclobutadiene and pentalene, by introducing one metal fragment through the first [2+2] cycloaddition reaction of a late-transition-metal carbyne with alkynes. Experimental observations and theoretical calculations reveal that the metal fragment decreases the antiaromaticity in cyclobutadiene and pentalene simultaneously, leading to air- and moisture-stable products. These molecules show broad absorption from the UV to the near-IR region, resulting in photoacoustic and photothermal effects for metalla-aromatic compounds for the first time. These results will encourage further efforts into the exploration of organometallic compounds for photoacoustic-imaging-guided photothermal therapy.
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