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Based on nitrogen sorption isotherm tests and powder X\u2010ray diffraction, a cationic mechanism is suggested, in which the polymerization takes place inside the open nanochannels of MOF catalysts and the space confinement effect of narrow open nanochannels originated from the coordination of PhNMe<jats:sub>2<\/jats:sub> from activator [PhNHMe<jats:sub>2<\/jats:sub>][B(C<jats:sub>6<\/jats:sub>F<jats:sub>5<\/jats:sub>)<jats:sub>4<\/jats:sub>] with the multiple metal centers of MOF catalysts might give a rational explanation for such controlled adjustment on the PIP's structure and properties.<\/jats:p>","DOI":"10.1002\/marc.201800002","type":"journal-article","created":{"date-parts":[[2018,3,5]],"date-time":"2018-03-05T06:58:45Z","timestamp":1520233125000},"source":"Crossref","is-referenced-by-count":11,"title":["Controlled Polymerization of Isoprene with Chromium\u2010Based Metal\u2010Organic Framework Catalysts: Switching from Cyclic to <i>cis<\/i>\u20101,4\u2010Selectivity Depending on Activator"],"prefix":"10.1002","volume":"39","author":[{"given":"Fei","family":"Gao","sequence":"first","affiliation":[{"name":"Key Laboratory of Cluster Science of Ministry of Education School of Chemistry and Chemical Engineering Beijing Institute of Technology  Beijing 100081 P. 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