Mingjie Zhang carried out the experiments, analyzed the data and wrote the original manuscript. Urbi Pal conceived and mentored the research and revised the manuscript. Faezeh Makhlooghiazad mentored and revised the manuscript. Shinji Kondou helped in IR data analysis. Luke A. O'Dell helped to carry out the NMR measurements. Claudio Gerbaldi co-conceived the project and revised the manuscript. Maria Forsyth coconceived and supervised the research and revised the manuscript. All the authors discussed the test results and put forward comments on the manuscript.