Preparation of Primary Amine Derivatives of the Magic-Size Nanocluster (CdSe)₁₃

Abstract

Four [(CdSe)13(RNH2)13] derivatives (R = n-propyl, n-pentyl, n-octyl, and oleyl) are prepared by reaction of Cd(OAc)2·2H2O and selenourea in the corresponding primary-amine solvent. The nanoclusters grow in spontaneously formed amine-bilayer templates, and are characterized by elemental analysis, IR spectroscopy, UV-visible spectroscopy, TEM, and low-angle XRD. The derivative [(CdSe)13(n-propylamine)13] is isolated as a yellowish-white solid (MP 98 °C) on the gram scale. These compounds are the first derivatives of magic-size CdSe nanoclusters to be isolated in purity.

Cluster-mediated assembly enables step-growth copolymerization from binary nanoparticle mixtures with rationally designed architectures

“… 24 As has been reported previously, molecular clusters ligated with long-chain ligands such as oleylamine and octylamine themselves tend to self-assemble into lamellar mesostructures. 13 , 25 With the addition of NPs capped by the similar long-chain ligands, we have found that these ultrasmall clusters have the tendency to co-assemble with the added NPs, presumably due to the strong van der Waals interactions between the two components. 24 This co-assembly process, driven by the minimization of the system energy, leads to the stepwise end-on attachment of NPs, resulting in polymer-like chains encapsulated by a half-cylindrical PbSO 4 cluster shell.…”

Thermal perturbation nucleation and growth of silver molybdate nanoclusters by a dynamic template route

“…4 Therefore, as a zero dimensional quantum system, nanoclusters have been developed as a special branch of experimental and theoretical research. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] H. Dong et al 4 who prepared the RuO 2 nanoclusters doped on the surface of TiO 2 found that electrons transferring from ruthenium oxide clusters to the surface upon light irradiation increased the possibility of spatially separating photoinduced electrons and holes, which was beneficial to the enhancement of photocatalytic activity. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] H. Dong et al 4 who prepared the RuO 2 nanoclusters doped on the surface of TiO 2 found that electrons transferring from ruthenium oxide clusters to the surface upon light irradiation increased the possibility of spatially separating photoinduced electrons and holes, which was beneficial to the enhancement of photocatalytic activity.…”

“…S. L. Li et al 6 who synthesized near-infrared fluorescent silver nanoclusters stabilized by the MUC1 aptamer proved the bright near-infrared luminescence, high stability and excellent biocompatibility of the MUC1-Ag nanoclusters. For example, Y. Y. Wang et al 17 prepared the primary amine derivative of the magic-size CdSe nanoclusters in the amine-bilayer templates. All these research studies showed the advantages of nanoclusters in each kind of application.…”

Coherent Exciton Dynamics in Ensembles of Size-Dispersed CdSe Quantum Dot Dimers Probed via Ultrafast Spectroscopy: A Quantum Computational Study

“…A wide variety of theoretical approaches have been proposed to investigate the electronic properties of QDs of several hundreds to thousands of atoms [45,46]. Solid-state all atom density functional theory (DFT) computations have been implemented with adequate pseudo potentials using a direct diagonalization (DD) method [47][48][49]. One can also use the semi-empirical tight-binding (TB) atomistic approach based on a parametrized near neighbor Hamiltonian and a reduced number of basis orbitals to obtain electron and hole particles energies and wave functions [50][51][52].…”