Pyrene Bearing Azo-Functionalized Porous Nanofibers for CO2 Separation and Toxic Metal Cation Sensing | Zendy

Oussama M. ElKadri | Zendy; Tsemre-Dingel Tessema | Zendy; Ruaa M. Almotawa | Zendy; Ravi Arvapally | Zendy; Mohammad H. AlSayah | Zendy; Mohammad A. Omary | Zendy; Hani M. ElKaderi | Zendy

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Pyrene Bearing Azo-Functionalized Porous Nanofibers for CO₂ Separation and Toxic Metal Cation Sensing

Author(s) -

Oussama M. ElKadri,

Tsemre-Dingel Tessema,

Ruaa M. Almotawa,

Ravi Arvapally,

Mohammad H. AlSayah,

Mohammad A. Omary,

Hani M. ElKaderi

Publication year - 2018

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.8b01920

Subject(s) - metal ions in aqueous solution , selectivity , luminescence , adsorption , metal , pyrene , fluorescence , chemistry , polymer , quenching (fluorescence) , inorganic chemistry , copper , porosity , chemical stability , materials science , organic chemistry , catalysis , physics , optoelectronics , quantum mechanics

A novel luminescent azo-linked polymer (ALP) has been constructed from 1,3,6,8-tetra(4-aminophenyl)pyrene using a copper(I)-catalyzed oxidative homocoupling reaction. The polymer displays high porosity with a Brunauer-Emmett-Teller surface area of 1259 m 2 g -1 and narrow pore size distribution (1.06 nm) and is able to take up a significant amount of CO 2 (2.89 mmol g -1 ) at 298 K and 1.00 bar with a high isosteric heat of adsorption of 27.5 kJ mol -1 . Selectivity studies applying the ideal adsorbed solution theory revealed that the novel polymer has moderately good selectivities for CO 2 /N 2 (55.1) and CO 2 /CH 4 (10.9). Furthermore, the ALP shows fluorescence quenching in the presence of Hg 2+ , Pb 2+ , Tl + , and Al 3+ ions. Compared with these ions, the ALP showed no sensitivity to light metal ions such as Na + , K + , and Ca 2+ in ethanol-water solution, clearly indicating the high selectivity of the ALP toward heavy metal ions. The exceptional physiochemical stability, high porosity, and strong luminescence make this polymer an excellent candidate as a fluorescent chemical sensor for the detection of heavy metal ions.

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