کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1322906 1499824 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tuning the molecular weight of ROMP polymers by using Grubbs type catalysts and terminal alkynes
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Tuning the molecular weight of ROMP polymers by using Grubbs type catalysts and terminal alkynes
چکیده انگلیسی


• Ruthenium vinyl carbene derivatives were used in ROMP reactions.
• Grubbs type catalysts were reacted with alkynes to form vinyl carbene derivatives.
• ROMP polymers with Mn values between 75 and 680 kDa were obtained.
• The role of alkyne in ROMP reactions were investigated via 1H NMR.

In this study, ruthenium vinyl carbene derivatives were obtained in situ by reacting Grubbs 1st and 2nd generation catalysts with terminal alkynes in toluene at 85 °C. These active species were used in ROMP of norbornene derivatives. The effect of alkyne/Ru (mol/mol) ratio and alkyne substituent on number average molecular weights (Mn) of ROMP polymers were investigated in detail. ROMP polymers with Mn values between 75 and 680 kDa were synthesized by varying alkyne/Ru (mol/mol) ratio in the presence of Grubbs type catalysts. The mechanism of the reaction and the role of alkyne in ROMP reactions were investigated in detail by 1H NMR.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 822, 1 November 2016, Pages 13–19
نویسندگان
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