TY - JOUR
T1 - Synthesis and characterization of poly(1,4,7-trioxacycloundecane-8,11-dione) macrocyclic functionalized hydrogel for high selectivity adsorption and complexation of bismuth ion
AU - Omondi, Brian A.
AU - Okabe, Hirotaka
AU - Hidaka, Yoshiki
AU - Hara, Kazuhiro
N1 - Funding Information:
Funding: This research was funded by JSPS KAKENHI Grant Number JP21656239, JP24360398.
Funding Information:
Acknowledgments: We appreciate the support from Kyushu University’s Center of Material Properties and Function for facilitating NMR measurements and the Center of advanced Instrumental Analysis for SEM measurements. The authors declare no conflict of interest in the preparation of this research work.
Funding Information:
We appreciate the support from Kyushu University's Center of Material Properties and Function for facilitating NMR measurements and the Center of advanced Instrumental Analysis for SEM measurements. The authors declare no conflict of interest in the preparation of this research work. This research was funded by JSPS KAKENHI Grant Number JP21656239, JP24360398.
Publisher Copyright:
© 2018 by the authors.
PY - 2018/6/13
Y1 - 2018/6/13
N2 - Macrocyclic functional hydrogels incorporating new poly cyclic active sites (1,4,7-trioxacycloundecane-8,11-dione) within their entire network, have been synthesized. Using the high-dilution coupling of the bi-functional monomers maleic acid and bis(chloroethyl)ether in a sol-gel chemistry synthesis, 11-membered chelate rings infused with three oxygen donor atoms were created and characterized, and their structures confirmed using Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopic analyses. The macrocyclic gel, designed for selective host-guest adsorption and complexation of metal substrates, was initially tested against an aqueous set of 14 metal competitive solutions, where it demonstrated exclusive selectivity for Bi3+ aq, with the other metals exhibiting zero adsorption. Further analysis using binary and single ion Bi3+-containing solutions showed a near-complete removal of Bi3+ using this polycyclic hydrogel, with 98% extraction efficiency and q = 9.80 mg/g. These results clearly confirm that the 1,4,7-trioxacycloundecane-8,11-dione cyclic sites are most suitable for high selectivity and capture of Bi. The metal substrates were entrapped within the 1,4,7-trioxacycloundecane-8,11-dione cyclic sites. Evidently, by exploiting the host-guest complexation chemistry of macrocycles, we were able to design hydrogel adsorbents whose networks were comprised entirely of macrocyclic active groups for possible purification works of copper involving bismuth impurities, and/or for efficient selective uptake and recovery of bismuth trace ions existing in highly competitive environments such as sea water.
AB - Macrocyclic functional hydrogels incorporating new poly cyclic active sites (1,4,7-trioxacycloundecane-8,11-dione) within their entire network, have been synthesized. Using the high-dilution coupling of the bi-functional monomers maleic acid and bis(chloroethyl)ether in a sol-gel chemistry synthesis, 11-membered chelate rings infused with three oxygen donor atoms were created and characterized, and their structures confirmed using Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopic analyses. The macrocyclic gel, designed for selective host-guest adsorption and complexation of metal substrates, was initially tested against an aqueous set of 14 metal competitive solutions, where it demonstrated exclusive selectivity for Bi3+ aq, with the other metals exhibiting zero adsorption. Further analysis using binary and single ion Bi3+-containing solutions showed a near-complete removal of Bi3+ using this polycyclic hydrogel, with 98% extraction efficiency and q = 9.80 mg/g. These results clearly confirm that the 1,4,7-trioxacycloundecane-8,11-dione cyclic sites are most suitable for high selectivity and capture of Bi. The metal substrates were entrapped within the 1,4,7-trioxacycloundecane-8,11-dione cyclic sites. Evidently, by exploiting the host-guest complexation chemistry of macrocycles, we were able to design hydrogel adsorbents whose networks were comprised entirely of macrocyclic active groups for possible purification works of copper involving bismuth impurities, and/or for efficient selective uptake and recovery of bismuth trace ions existing in highly competitive environments such as sea water.
UR - http://www.scopus.com/inward/record.url?scp=85048660610&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85048660610&partnerID=8YFLogxK
U2 - 10.3390/polym10060662
DO - 10.3390/polym10060662
M3 - Article
AN - SCOPUS:85048660610
SN - 2073-4360
VL - 10
JO - Polymers
JF - Polymers
IS - 6
M1 - 662
ER -