TY - JOUR
T1 - Controlling the Uptake and Regulating the Release of Nitric Oxide in Microporous Solids
AU - Haikal, Rana R.
AU - Hua, Carol
AU - Perry, John J.
AU - O'Nolan, Daniel
AU - Syed, Imran
AU - Kumar, Amrit
AU - Chester, Adrian H.
AU - Zaworotko, Michael J.
AU - Yacoub, Magdi H.
AU - Alkordi, Mohamed H.
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/12/20
Y1 - 2017/12/20
N2 - Representative compounds from three classes of microporous solids, namely, metal-organic frameworks (MOFs), hybrid ultra-microporous materials (HUMs), and porous-organic polymers (POPs), were investigated for their nitric oxide gas uptake and release behavior. Low-pressure sorption studies indicated strong chemisorption of NO on the free amine groups decorating the MOF UiO-66-NH2 when compared to its non-amine-functionalized parent. The HUMs demonstrated reversible physisorption within the low-pressure regime, but interestingly in one case there was evidence for chemisorption following pressurization with NO at 10 bar. Significant release of chemisorbed NO from the UiO-66-NH2 and one of the HUMs was triggered by addition of acid to the medium, a pH change from 7.4 to 5.4 being sufficient to trigger NO release. An imidazole-based POP exhibited chemisorption of NO at high pressure wherein the ring basicity facilitated both NO uptake and spontaneous release upon contact with the aqueous release medium.
AB - Representative compounds from three classes of microporous solids, namely, metal-organic frameworks (MOFs), hybrid ultra-microporous materials (HUMs), and porous-organic polymers (POPs), were investigated for their nitric oxide gas uptake and release behavior. Low-pressure sorption studies indicated strong chemisorption of NO on the free amine groups decorating the MOF UiO-66-NH2 when compared to its non-amine-functionalized parent. The HUMs demonstrated reversible physisorption within the low-pressure regime, but interestingly in one case there was evidence for chemisorption following pressurization with NO at 10 bar. Significant release of chemisorbed NO from the UiO-66-NH2 and one of the HUMs was triggered by addition of acid to the medium, a pH change from 7.4 to 5.4 being sufficient to trigger NO release. An imidazole-based POP exhibited chemisorption of NO at high pressure wherein the ring basicity facilitated both NO uptake and spontaneous release upon contact with the aqueous release medium.
KW - acid-triggered release
KW - chemisorption
KW - microporous solids
KW - nitric oxide sorption
KW - porous-organic polymer
UR - http://www.scopus.com/inward/record.url?scp=85038614844&partnerID=8YFLogxK
U2 - 10.1021/acsami.7b15095
DO - 10.1021/acsami.7b15095
M3 - Article
C2 - 29182298
AN - SCOPUS:85038614844
SN - 1944-8244
VL - 9
SP - 43520
EP - 43528
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 50
ER -