Synthesis And Opto-electronic Research Of Planar Coordinatied Compounds

In this article we designed and synthesized ruthenium phthalocyanine dimer, soluble phthalocyanine and its metal complexes, imidazole substituted porphyrins and their metal complexes; studied the self-assembly characteristics of soluble copper phthalocyanine and [Pt(CNtBu)2(CN)2] compounds, intermolecular electron transfer behavior of porphyrins and the preparation of conductive nano-devices; explored the relationship between the structure of organic solid material and its charge transfer properties; tested the chemical atmosphere sensitivity of the device by electrical signals.1, Ruthenium phthalocyanine compound and its dimer were synthesized. The ruthenium phthalocyanine compound with axial pyridine ligands gives nano-crystallines with different growth trends by solvent evaporation method. We studied UV-vis absorption spectra of the synthesized compounds in detail. Nanodevice of ruthenium phthalocyanine compound was prepared and its conductivity property was tested. Further we explained the relationship between the conductivity and structure, and use this device to sense the atmosphere of pyridine and hydrazine. The result is a better understanding of the assembly behavior of organic solid materials, micro-morphology, solid light-emitting, which has established the relationship between the conductivity and the structure of organic solid materials.2, Such a side chain provides the molecule with an ideal balance between the solubility andπ-πstacking, the greater conformational flexibility of the alkyl chain affords Pcs sufficient solubility in hydrophobic solvents like chloroform. Herein, we report for the first time the fabrication of nanowires and ultralong microwires in large scale from a soluble copper(II) 1,4,8,11,15,18,22,25-octa-n-butoxyphthalocyan (CuPcOC4) molecule, which is very important that are able to act as organic semiconductors and also easy to grow single crystals or films just by drop casting, a very simple method. Nanowires and ultralong microwires of organic semiconductor CuPcOC4 were prepared by cast assembly. Because of the merits of cast assembly, these nanostructures could be synthesized in large quantity and large scale at low cost. Precise morphology and size controlled nanostructures were obtained by carefully adjusting the concentrations of CuPcOC4 in different solvent. Moreover, the long length of microwires facilitates the construction of two-electrode devices employing the microwire as channel material; the long-rangeπ-πmolecular stacking allows for efficient conductivity modulation through surface doping. A combination of these two characters will enable broad optoelectronic and OFETs applications with these long microwires.3, Six porphyrin compounds were synthesized, and UV absorption and fluorescence (phosphorescence) emission properties of the system were the tested, even about the depth of their luminescent properties. The emission intensity with concentration change of porphyrin 5 was studied as an example, when the concentration decreased, the red zone significantly lowered emission, while the blue emission region was significantly enhanced. It is due to the energy transfer between the molecules in solution, when the concentration was high, energy transfer from the imidazolyl groups to other porphyrin molecules was frequent, which showed a stronger red emission, when the concentration was lower, energy transfer among molecules was weakened, as a result, just the same as single molecule fluorescence spectroscopy, the blue emission of imidazolyl group became stronger.4, We report that PtⅡ…PtⅡinteractions could be employed to construct ordered micro-structure, and simultaneously result in the novel photo and vapor responsive conducting properties.1-D micro-structure, multi-functions and device have been successfully achieved based on intermolecular PtⅡ…PtⅡinteractions. Our previous study demonstrated that the PtⅡ…PtⅡinteractions induced [Pt(CNtBu)2(CN)2] nao- and micro-wires could be obtained by reprecipitation or casting-evaporation processes. We carried out electrical conductivity characterization based on direct current-voltage (Ⅰ-Ⅴ) measurement, which was performed based on the [Pt(CNtBu)2(CN)2] microwires formed on the insulating SiO2 substrates with an interdigitated electrode (IDE). Upon irradiating at a constant light intensity of 4.0 mW/cm2, the photoresponsive current exhibited wavelength dependent property, which reveals that the maxima photo-induced current has been obtained when the excitation wavelength was in range of 400-500 nm. To understand the semiconducting properties of [Pt(CNtBu)2(CN)2] wires, a bottom-contact field effect transistor (FET), in which configuration with perpendicular direction to the source and drain electrodes, has been fabricated. We conclude that the [Pt(CNtBu)2(CN)2] molecule supports ambipolar charge-transport. Importantly, environmental atmosphere can obviously affect the conducting property of [Pt(CNtBu)2(CN)2] microwires. The methanol and acetonitrile vapors could lead to the conductivity of [Pt(CNtBu)2(CN)2] microwires increase and decrease, respectively, suggesting that this kind of microwires has the potential to develop chemosensing devices with good selectivity and fast responsibility.