TY - JOUR
T1 - Hierarchical supramolecular assembly based on metal coordination of asymmetric ligand pairs and host-guest recognition
AU - Li, Hui
AU - Dong, Yan
AU - Li, Ri Qiang
AU - Zhang, Yan
AU - Liu, Shengyong
AU - Tian, Wei
N1 - Publisher Copyright:
© 2025 The Royal Society of Chemistry.
PY - 2024/11/15
Y1 - 2024/11/15
N2 - Three distinct monomers were synthesized, namely CD2, E2, and F2. Monomer CD2 is composed of a crown ether group (B21C7) and two terpyridine (tpy) groups, monomer E2 contains two 6,6′′-di(2,6-dimethoxylphenyl)-substituted terpyridine (tmy) groups, and the homoditopic F2 comprises two ammonium salts (DAS). By combining monomer CD2 with Zn(OTf)2, a supramolecular linear polymer (SLP1) was successfully obtained through metal coordination based on terpyridyl units. Upon introducing monomer E2 into the solution containing SLP1, a novel supramolecular linear polymer (SLP2) was formed in the solution via complementary metal coordination. Furthermore, by adding another monomer F2 to the solution of SLP2, we observed a further structural transformation of SLP2 into a supramolecular crosslinked polymer (SCP3). This transformation was facilitated by double noncovalent interactions involving both complementary metal coordination and host-guest recognition. Notably, all resulting supramolecular polymers, SLP1, SLP2, and SCP3, exhibited remarkable sensitivity towards OH− along with noticeable changes in their fluorescence emission properties. Moreover, at high concentrations, SCP3 demonstrated the ability to form a supramolecular gel while also exhibiting excellent self-healing properties.
AB - Three distinct monomers were synthesized, namely CD2, E2, and F2. Monomer CD2 is composed of a crown ether group (B21C7) and two terpyridine (tpy) groups, monomer E2 contains two 6,6′′-di(2,6-dimethoxylphenyl)-substituted terpyridine (tmy) groups, and the homoditopic F2 comprises two ammonium salts (DAS). By combining monomer CD2 with Zn(OTf)2, a supramolecular linear polymer (SLP1) was successfully obtained through metal coordination based on terpyridyl units. Upon introducing monomer E2 into the solution containing SLP1, a novel supramolecular linear polymer (SLP2) was formed in the solution via complementary metal coordination. Furthermore, by adding another monomer F2 to the solution of SLP2, we observed a further structural transformation of SLP2 into a supramolecular crosslinked polymer (SCP3). This transformation was facilitated by double noncovalent interactions involving both complementary metal coordination and host-guest recognition. Notably, all resulting supramolecular polymers, SLP1, SLP2, and SCP3, exhibited remarkable sensitivity towards OH− along with noticeable changes in their fluorescence emission properties. Moreover, at high concentrations, SCP3 demonstrated the ability to form a supramolecular gel while also exhibiting excellent self-healing properties.
UR - http://www.scopus.com/inward/record.url?scp=85209993721&partnerID=8YFLogxK
U2 - 10.1039/d4qo01926a
DO - 10.1039/d4qo01926a
M3 - 文章
AN - SCOPUS:85209993721
SN - 2052-4110
VL - 12
SP - 248
EP - 255
JO - Organic Chemistry Frontiers
JF - Organic Chemistry Frontiers
IS - 1
ER -