Journal
ACS APPLIED NANO MATERIALS
Volume 3, Issue 2, Pages 2038-2046Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.0c00135
Keywords
silver nanoclusters; hydrogels; aggregation-induced emission; self-assembly; light-emitting diodes
Funding
- National Natural Science Foundation of China [21972077, 21201110, 21571115]
- Young Scholars Program of Shandong University [2016WLJH20]
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Supramolecular self-assembly is an effective method for constructing complex ordered aggregates with specific functions by noncovalent bonding. However, silver nanoclusters (NCs) have rarely been explored in the self-assembly of nanoscale building blocks, and the noncovalent forces (electrostatic, hydrogen-bonding, pi-pi-stacking interactions, etc.) and argentophilic interactions [Ag(I)center dot center dot center dot Ag(I)] are crucial in directing to the supramolecular self-assembly of Ag(I) compounds. Here, we used silver NCs (Ag-9-NCs, [Ag-9(mba)(9)], where H(2)mba = 2-mercaptobenzoic acid) as the model cluster to interact with succinic acid (SA) to construct a nanofiber structure. The formation of highly ordered nanofibers is the result of SA-modified peripheral ligands of Ag-9-NCs. Under the action of noncovalent forces (hydrogen-bonding, pi-pi-stacking, and hydrophobic interactions), the reconstruction of this ordered structure not only increases the content of Ag(I) species in the protective shell of Ag-9-NCs but also provides the possibility for directional argentophilic interactions [Ag(I)center dot center dot center dot Ag(I)]. More interestingly, the compact structure and effective argentophilic interactions in the nanofibers synergistically achieve aggregation-induced emission, thereby inducing the emission of phosphorescence, which can be used as a temperature-controlled detector. Moreover, the orange-red Ag-9-NCs/SA xerogels, together with commercial phosphor, can also be used as a phosphor to produce white-light-emitting-diode color conversion materials.
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