1. College of Chemistry and Chemical Engineering Henan Province Key Laboratory of Utilization of Non‐Metallic Mineral Xinyang Normal University Xinyang 464000 P. R. China
2. Key Laboratory of Microelectronic Devices and Integrated Technology Institute of Microelectronics Chinese Academy of Sciences Beijing 100029 P. R. China
3. Department of Medicinal Chemistry Virginia Commonwealth University Richmond VA 23284 USA