Trapani Mariachiara, Castriciano Maria Angela, Romeo Andrea, De Luca Giovanna, Machado Nelson, Howes Barry D, Smulevich Giulietta, Scolaro Luigi Monsù
CNR-ISMN, Istituto per lo Studio dei Materiali Nanostrutturati c/o Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, University of Messina V. le F. Stagno D'Alcontres, 3198166 Messina, Italy.
Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali and C.I.R.C.M.S.B., University of Messina V. le F. Stagno D'Alcontres, 3198166 Messina, Italy.
Nanomaterials (Basel). 2019 Jul 18;9(7):1026. doi: 10.3390/nano9071026.
The interaction between gold sub-nanometer clusters composed of ten atoms (Au) and tetrakis(4-sulfonatophenyl)porphyrin (TPPS) was investigated through various spectroscopic techniques. Under mild acidic conditions, the formation, in aqueous solutions, of nanohybrid assemblies of porphyrin J-aggregates and Au cluster nanoparticles was observed. This supramolecular system tends to spontaneously cover glass substrates with a co-deposit of gold nanoclusters and porphyrin nanoaggregates, which exhibit circular dichroism (CD) spectra reflecting the enantiomorphism of histidine used as capping and reducing agent. The morphology of nanohybrid assemblies onto a glass surface was revealed by atomic force microscopy (AFM), and showed the concomitant presence of gold nanoparticles with an average size of 130 nm and porphyrin J-aggregates with lengths spanning from 100 to 1000 nm. Surface-enhanced Raman scattering (SERS) was observed for the nanohybrid assemblies.
通过各种光谱技术研究了由十个原子组成的金亚纳米团簇（Au）与四（4-磺酸苯基）卟啉（TPPS）之间的相互作用。在温和酸性条件下，观察到在水溶液中形成了卟啉J-聚集体和金团簇纳米颗粒的纳米杂化组装体。这种超分子体系倾向于用金纳米团簇和卟啉纳米聚集体的共沉积物自发覆盖玻璃基板，这些共沉积物表现出反映用作封端和还原剂的组氨酸对映体形态的圆二色性（CD）光谱。通过原子力显微镜（AFM）揭示了玻璃表面上纳米杂化组装体的形态，显示出平均尺寸为130nm的金纳米颗粒和长度在100至1000nm之间的卟啉J-聚集体同时存在。观察到纳米杂化组装体的表面增强拉曼散射（SERS）。
