TAILIEUCHUNG - Structural and Electronic Conformation of Polymer Matrix in Polyaniline Films containing Nickel-Nanoclusters

Structural and electronic transitions in polyaniline (PANI) matrix due to the presence of nickel-nanoclusters (PANI-Ni) were investigated via UV-Vis spectroscopic measurements. The obtained results indicate that there exist two populous packets of polaron (located at 872 and 973 nm) in both PANI and PANI-Ni. Due to the presence of nickel-nanoclusters, a quinoid-to- aromatic conversion was intensively happened and evidenced by: i- the existence of a steadily increasing absorption tail; ii- degeneration of a ground state of polarons of PANI and split into three exciting states with three sublevels of energy. Consequently, the polaron lattice of PANI was revealed in a higher degree of electron delocalization in PANI-Ni. | Journal of Chemistry Vol. 44 2 P. 255 - 258 2006 STRUCTURAL AND ELECTRONIC CONFORMATION OF POLYMER MATRIX IN POLYANILINE FILMS CONTAINING NICKEL-NANOCLUSTERS Received 26 July 2005 TRAN TRUNG Faculty of Chemical Technology Hanoi University of Technology summary Structural and electronic transitions in polyaniline PANI matrix due to the presence of nickel-nanoclusters PANI-Ni were investigated via UV-Vis spectroscopic measurements. The obtained results indicate that there exist two populous packets of polaron located at 872 and 973 nm in both PAN I and PANI-Ni. Due to the presence of nickel-nanoclusters a quinoid-to-aromatic conversion was intensively happened and evidenced by i- the existence of a steadily increasing absorption tail ii- degeneration of a ground state of polarons of PANI and split into three exciting states with three sublevels of energy. Consequently the polaron lattice of PANI was revealed in a higher degree of electron delocalization in PANI-Ni. Key words UV-Vis PANI Ni-nanoclusters Degeneration Quinoid-to-aromatic conversion. I - INTRODUCTION Polyaniline PANI in various size and structure is still one of the most attractive organic conducting polymers that have been widely studying. The changes in the structural and electronic conformation of PANI matrix is an important concern of practical applications of PANI. There is an interest that these changes are strongly dependent on the synthesis approach and its parameters nature of electrolyte nature of dopants etc. Therefore these give a number of various approaches to prepare a lot of kind of polyaniline composites in various morphology and structures 1 - 5 . Nanoparticles of transition metal oxides incorporated in conducting polymer matrix are known well as a source to promote internal and external molecular electron transfers. Because electrons may shuttle between polymer chains via strong hybrids of the unfilled-d orbitals of transition metal oxide and the lone pair of electrons of nitrogen .

• Hoá học
• Công nghệ hóa
• Electronic Conformation
• Polymer Matrix
• Polyaniline Films
• Hóa hữu cơ
• Vật liệu polyme
• Kỹ thuật hệ thống công nghệ hóa học
• Hệ thống công nghệ hóa học
• Công nghệ hóa học
• Tối ưu hóa
• Quá trình công nghệ hóa học
• Phương pháp giải thích
• Quy hoạch toán học
• Phương pháp gradient
• Mô hình hóa công nghệ hóa học
• Nghiên cứu công nghệ hóa học
• Mô tả công nghệ hóa học
• giáo trình công nghệ hóa học
• thiết bị công nghệ hóa học
• bài giảng công nghệ hóa học
• công nghệ hóa chất
• tài liệu công nghệ hóa chất
• áp dụng công nghệ hóa chất
• tìm hiểu công nghệ hóa chất
• nghiên cứu công nghệ hóa chất
• công nghệ hóa dầu
• bài giảng công nghệ hóa dầu
• giáo trình công nghệ hóa dầu
• tài liệu công nghệ hóa dầu
• lý thuyết công nghệ hóa dầu