Novel Porphyrinated Polyimide Nanofibers by Electrospinning

Abstract

A series of copolymers based on diaminotetraphenylporphyrin (DATPP), oxidianiline (ODA), and pyromellitic dianhydride (PMDA) were synthesized. The resulting copoly(amic acid)s (CPAAs) were electrospun into uniform nanofibers. Subsequently, copolyimide (CPI) nanofibers were obtained from the CPAA nanofibers by thermal imidization. The morphologies and luminescence of these nanofibers were characterized by field emission scanning electron microscopy (FESEM) and confocal laser scanning microscopy (CLSM). It was found from the CLSM analyses that fluorescence quenching took place after the nanofibers were imidized. This could be attributed to the photoinduced electron transfer from excited porphyrin units to diimide acceptor groups. Thermogravimetric (TG) analyses indicated the CPI nanofibers possessed excellent thermal stability. This kind of CPI nanofibers with high temperature resistance and unique photoelectric properties could be potential materials for optical switches, catalysis, nonlinear optics, and molecular wires used in normal and especially in high temperature circumstances.

Organic Fluorescent Nanofibers and Sub-Micrometer Rods

“…Polymers can also be dye-doped. In this case, the dye molecules can be either covalently fixed or simply dispersed in the bulk (Camposeo et al, 2007;DiBenedetto et al, 2008;Fantini & Costa, 2009;Lee et al, 2002;Liang et al, 2008;Lv et al, 2008;Tomczak et al, 2006;Tao et al, 2007;Yang et al, 2009;Wan et al, 2006;Wang et al, 2001;Wang, Drew & et al, 2002;Wang et al, 2007;Wang et al, 2008), incorporated in zeolite embedded in the polymer structure (Cucchi et al, 2007;Vohra et al, 2009), or even forming a distinct phase (Lee et al, 2006;Li et al, 2009). Electrospinning is the most currently used fabrication method.…”

A Novel Porphyrin-Containing Polyimide Nanofibrous Membrane for Colorimetric and Fluorometric Detection of Pyridine Vapor

“…A typical procedure for the electrospinning of ZPCPI nanofibrous membrane is as described in the literature [33–36]. ZPPAA was dissolved in DMAc to form a 16 wt.% solution.…”

Novel Polyimide Materials Produced by Electrospinning

“…In 2008, Lv et al reported that they used two kinds of diamines: diaminotetraphenylporphyrin and ODA, copolymerized with PMDA to form porphyrin modified PAA (Lv et al, 2008). Then it was electrospun and imidized into fluorescent nonwoven mat.…”