The design of organic electronic devices is heavily dependent upon the orientation of the molecular solid which influences the direction that charge carriers are able to traverse across the π-system. In this work, thin films of copper phthalocyanine (CuPc) were deposited using thermal deposition over SiO2 and CuI both substrates having demonstrated the ability to confer different orientations onto thermally evaporated CuPc. A variety of scattering and spectroscopic techniques were utilized to characterize the electronic, chemical, and crystalline structures of CuPc to determine the effects that the substrates have over these structures when the molecule's self-assembly is altered. The findings in this study will be integrated into future works as reference points and control studies in order to draw meaningful and direct connections between MPcs that have differing electron affinity, transition metal cores, and functional groups as well as multi-layers of various MPcs within unique heterojunctions.

We prepare a series of gold-silver alloy nanoparticles with different Au/Ag mole ratio. The UV/Vis absorption spectra of nanoparticle solutions exhibited one surface plasmon resonance absorption band and the surface plasmon absorption band of the gold-silver alloy nanoparticles is blue-shifted with increase the Ag content. Finally, we produced the nanoparticles capping with alkanethiolate and alkanecarboxylate via place-exchange reaction. The nanoparticles have been characterized by ICP-MS, TEM, 13C-NMR, FT-IR, UV-Vis absorption spectroscopy. We suggest that the carboxylate group is coordinated to the Ag ion as a bridging bidentate.

The cyclic voltammogram of complex 6 shows one successive reversible one-electron redox wave corresponding to the oxidation of the Ruthenium moiety and peak-to-peak separations are smaller than 59 mV(ideal value of one electron transfer with diffusing controlling). In addition, the peak currents are linear to scan rate, i.e., i £\ V. This observation is corresponding to the electrochemical property of SAM, and we would like to suggest that the electron transfer process in the electrochemical measurements is direct controlling. Furthermore, we synthesized a nano-material by using of redox stable Ru(II)-Terpyridyloctanethiol attached to gold cluster (complex 7). The clusters are stable in air, soluble in nonpolar organic solvents and the characters could be examining by traditional chemical instruments such as NMR, UV/Vis, TEM. Finally, complex 7 seif-assembled on gold electrode (complex 8). This observation is corresponding to the electrochemical property of SAM, and we would like to suggest that the electron transfer process in the electrochemical measurements is direct controlling. we would like to suggest that the complex 5 has bi-functionalized property.

The preparation and spectroscopic characterizations of size-controlled Pyridine-functionalized gold clusters formed self-assembled 2D superlattices with hexagonal packing were studied. The characterizations of pyridine-modified Au clusters using TEM, UV-vis, NMR and ESCA techniques are also reported. Pyridine-functionalized monolayer-protected Au clusters (MPCs) were prepared as illustrated in Scheme 1. The gold nanoparticles prepared by the reduction with NaBH4 have 3.2 ¡Ó 0.88 nm average core diameters established by TEM. The ~3 nm particles were used to induce size and shap evolution with heating treatment in toluene or in TOABr (tetraoctylammonium bromide). The pyridine-functionalized MPCs exhibit an identifiable plasmon resonance band at ~515 nm. The confirmation of the functionalization of pyridyl octanethiol in Au MPCs came from the downfield NMR resonances in the region of 120-150 ppm, which were established the resonances of the Py moiety.

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A series of novel metallic nanoparticle and suspension were developed and synthesized for ink-jet printing and spin coating applications. Organic components, such as alkanethiols and amines, were used as new capping agent design. The suspension was characterized by NMR, ESCA, TEM, SEM, EDS, TGA, DTG, DSC, TA-MS for chemical composition and three-dimension SAMs desorption.

In addition to the well known quantum confinement effects resulted from size and shape, interfacial bond structure is another factor, affecting the properties of the nanomaterial that is rarely studied. Inspired by the “Au-S-Au” staple motif discovered from the crystal structure of monothiol protected Au102 nanocluster (Science, 2007, 318, 430), dithiol molecules (e. g. 1, 2-dithiol, 1, 4-dithiol, etc.) with molecular structural constraint have been employed to create dithiolate protected clusters or mixed monothiolate and dithiolate protected clusters. The structure and properties of the Au clusters are expected to change due to two effects: The entropy gain of dithiol over monothiol protection and the constraint to the formation of the thiol bridging motif. DMPS (1, 2-dithiol molecule) stabilized clusters with characteristic absorption bands have been obtained, and characterized by multiple techniques. Monolayer reaction on gold core surface between the monothiol tiopronin and dithiol DMPS has been performed, and the mechanism has been probed. Mixed phenylethanethiolate and durene-dithiolate (1, 4-dithiol molecule) protected Au130 clusters with rich electrochemical features have been created, and the optical and electrochemical energetics have been successfully correlated based on core and core-ligand energy states. Furthermore, the impact of 1, 4-dithiolate-Au bonding on the near infrared luminescence has been studied.