Date of Award
Doctor of Philosophy
Luis A. Echegoyen
Three new boronate-ester based covalent organic frameworks (CoPc-PorDBA, CoPc-BPDA and HHTP-PorDBA), an imine-linked porphyrin porous polymer (CuPor-BPDC) and imine and benzothiazole based porous polymers (IBTP), and a triazole based phthalocyanine "click" polymer (Pc-POP) were synthesized. The CoPc-PorDBA and CoPc-BPDA COFs exhibited high BET surface areas (1087, 1315 m2 g-1, respectively) whereas HHTP-PorDBA showed a low BET surface area of 205 m2 g-1. The H2 storage capacities of CoPc-BPDA and CoPc-PorDBA range between 0.8-1.2wt% at 77K, 1bar and the CH4 storage capacities range between 0.4-0.8wt% at 298K, 1bar. These materials also had good thermal stabilities up to 350Â° C. The BET surface areas of Porous polymers CuPor-BPDC, IBTP, and Pc-POP, are 428 m2 g-1, 442 m2 g-1, and 115 m2 g-1, and showed CO2 capture capacities of 5.5 wt%, 7.8 wt%, and 11.9 wt%, respectively, at 273 K/1 bar with selectivities for CO2/CH4 adsorption ranging between 5.4-6.4 . The chemical connectivity and composition of the COFs (CoPc-PorDBA, CoPc-BPDA, HHTP-PorDBA) and of the polymers (CuPor-BPDC, IBTP, Pc-POP) were characterized by several methods such as infrared spectroscopy, powder X-ray diffraction (PXRD), solid-state 13C CP-MAS NMR, surface area measurements, solid-state UV-Vis, and thermogravimetric and elemental analysis.
Received from ProQuest
Neti, Venkata, "Design And SYNThesis Of Porous Organic Frameworks For H2 And Ch4 Storage And For Selective CO2 Adsorption" (2014). Open Access Theses & Dissertations. 1690.