Reversible Photoisomerization of Spiropyran on the Surfaces of Au25 Nanoclusters.

Supporting Information Reversible Photoisomerization of Spiropyran on the Surfaces of Au25 Nanoclusters

On the reversible photoisomerization of spiropyran-modified zeolite L single crystals.

Photoisomerization of spiropyrans has been the subject of many interesting studies in a wide number of fields, such as sensors for cations, sensors of pH, switchable surfaces, lasing effect, among many others. This molecule can be photoisomerized upon UV irradiation, giving rise to the zwitterionic merocyanine (MC) form, which dramatically changes its hydrophilicity and photophysical properties...

Polarization properties of fluorescent BSA protected Au25 nanoclusters.

BSA protected gold nanoclusters (Au25) are attracting a great deal of attention due to their unique spectroscopic properties and possible use in biophysical applications. Although there are reports on synthetic strategies, spectroscopy and applications, little is known about their polarization behavior. In this study, we synthesized the BSA protected Au25 nanoclusters and studied their steady s...

Self-assembled solvato-morphologically controlled photochromic crystals.

Here we describe, for the first time, intriguing solvato-morphological control of spiropyran-based microcrystalline structures. These microstructures exhibit reversible photoisomerization upon light irradiation (UV/Vis) in the solid-state. Finally, light-guided aggregation of these microstructures at the liquid/air interface is also demonstrated.

Dynamic study on the transformation process of gold nanoclusters.

In this paper, the transformation process from Au8 to Au25 nanoclusters (NCs) is investigated with steady state fluorescence spectroscopy and time-resolved fluorescence spectroscopy at various reaction temperatures and solvent diffusivities. Results demonstrate that Au8 NCs, protected by bovine serum albumin, transform into Au25 NCs under controlled pH values through an endothermic reaction wit...