While single thiolate-stabilized silver nanoclusters (NCs) are well studied, multiligand-protected analogues remain rare. Herein, we report a luminescent Ag24 nanocluster, co-stabilized by two distinct heterocyclic thiols, 2-mercapto-5-n-propylpyrimidine and 6-(dibutylamino)-1,3,5-triazine-2,4-dithiol, together with triphenylphosphine, whose composition was confirmed by high resolution electrospray ionization (HR-ESI) mass spectrometry. It shows aggregation-caused quenching as it self-assembles into nonemissive sheets, but the emission reappears after mechanical grinding, demonstrating mechanoresponsive luminescence. Interestingly, individual ligands form nonluminescent clusters exhibiting no aggregation behavior. Femtosecond transient absorption measurements indicate that aggregation alters the excited-state dynamics, reflecting the effect of multiligand stabilization on structural rigidity and photophysical behavior in the NCs.
In this work, red-fluorescent silver nanoclusters (MMTA@Ag NCs) with aggregation-induced emission (AIE) properties were synthesized via a facile one-pot strategy at room temperature using 2-mercapto-4-methyl-5-thiazoleacetic acid (MMTA) as the capping ligand. The as-prepared Ag NCs initially exhibited weak fluorescence...
Silver nanoclusters (Ag NCs) occupy a rare chemical space where atomic precision, quantum-confined electronic structures, and rich excited-state behavior converge, yet their practical utility is often limited by structural fragility, environmental sensitivity, and weak processability. Reticularization offers a powerful...
Tsukasa Irie, Tokuhisa Kawawaki, Saikat Das et al.· Precision Chemistry· 0 citations
Polymetallic nanoclusters (NCs) offer a powerful route to brighter and more tunable luminescent materials, while biopolymer ligands provide additional advantages for sensing and bioimaging. However, the mechanisms responsible for luminescence enhancement remain poorly understood, particularly for DNA- and protein-prote...
A. Buglak, V. G. Kubenko, N. Shekhovtsov et al.· Molecules· 0 citations
Stabilizing silver and copper nanoparticles remains a persistent challenge due to their rapid oxidation and surface degradation under ambient conditions. Ligand engineering offers a powerful strategy to control nanoparticle stability; however, N-heterocyclic carbenes (NHCs), including mesoionic NHCs (mNHCs), despite th...
Marilyne Bélanger-Bouliga, Lucille Kuster, I. Ebralidze et al.· Nanoscale· 0 citations
Despite the significant advancements in noble metal-based nanocluster research, challenges remain in making specific metal kernel geometries, especially protected by bulky ligand shells. Here, we synthesized and structurally characterized a neutral silver cluster, [Ag14(TRZ)12(TPP)3], where TRZ and TPP refer to 6-(dibu...
Arijit Jana, Akhil S. Nair, A. K. Poonia et al.· ACS Applied Materials and In...· 0 citations
The design of advanced photonic materials with integrated stimuli-responsive properties remains coveted yet challenging. Herein, we demonstrate that chiral supramolecular assembly of triphenylamine[3]arenes (TPA[3]s) offers an efficient and modular solution to address this challenge. Despite intrinsically nonplanar and...
