Photophysical and photochemical behavior of electrospun fibers of a polyurethane polymer chemically linked to lutetium carboxyphenoxy phthalocyanine

Comparative phototransformation of environmental pollutants using metallophthalocyanines supported on electrospun polymer fibers

“…The fluorescence quantum yield (ϕ F ) was determined using unsubstituted zinc phthalocyanine as standard and a value of ϕ F < 0.01 was obtained. Similar low fluorescence quantum yields of Lu phthalocyanine complexes have been reported21,22 and attributed to the heavy atom effect. A Similar reason has also been assigned to phthalocyanine complexes of hafnium which do not fluoresce at all 32…”

“…For PUR/complex 5 covalently functionalized fiber, photoactivity has been reported to be maintained 21. The functionalized fibers could not degrade any of the pollutants to any detectable extent, even after 12 h of irradiation.…”

“…Figure 1 shows all the phthalocyanine and polymer structures. The phthalocyanines are: zinc(II) 2(3), 9(10), 16(17), 23(24)‐(tetrapyridyloxy)]‐phthalocyanine ( 1 ),18 zinc(II) 2(3), 9(10), 16(17), 23(24)‐tetrakis[4‐( N ‐methylpyridyloxy)]‐phthalocyanine ( 2 ),18,19 zinc 2(3), 9(10), 16(17), 23(24)‐tetraaminophthalocyanine ( 3 ),20 2(3), 9(10), 16(17), 23(24)‐(tetraaminophthalocyaninato) lutetium acetate ( 4 ),15 2(3), 9(10), 16(17), 23(24)‐(tetracarboxyphenoxyphthalocyaninato) lutetium acetate ( 5 )21 2(3), 9(10), 16(17), 23(24)‐(phenoxyphthalocyaninato) lutetium acetate ( 6 ), 2(3), 9(10), 16(17), 23(24)‐(tetrapyridyloxyphthalocyanato lutetium acetate ( 7 )17 and 1(4), 8(11), 15(18), 22(25)‐(tetraphenoxyphthalocyaninato) lutetium acetate ( 9 ),22 and were synthesized according to literature procedures. Synthesis of 2,(3), 9(10), 16(17), 23(24)‐tetrakis[4‐( N ‐methylpyridiloxy)phthalocyaninato] lutetium acetate ( 8 ) is described in this work, Scheme .…”

Zinc(II) 2,9,16,23-tetrakis[4-(N-methylpyridyloxy)]-phthalocyanine anchored on an electrospun polysulfone polymer fiber: Application for photosensitized conversion of methyl orange

“…One important consequence is that aggregation of these metallophthalocyanines (MPcs) is avoided when anchored on solid supports in contrast to what often happens in solutions, which limit their effectiveness as catalysts [22]. Recently, we reported the immobilization of a phthalocyanine on an electrospun polymer fiber with its photoactivity still maintained within the solid polymer matrix [23]. The use of electrospun fibers containing photocatalysts for the phototransformation of azo dyes has not been reported.…”

Fabrication of Hybrid Membranes Containing Nylon-11 and Organic Semiconductor Particles with Potential Applications in Molecular Electronics

“…Finally, the membranes were analyzed, after subjecting them to accelerated lighting conditions, in order to determine their stability with radiation and their possible application in molecular electronics. Introducing MPcs into Nylon-11 could give outstanding and effective properties in membrane applications [19,[26][27][28][29][30][31]. Some examples of these applications include use as photosensitizers [32,33], for photocatalytic reactions [19,34], or as separation membranes by their permselectivity [35], although the information about the manufacture of semiconductor membranes that could be used in electronic devices as diodes (OLED) or organic transistors (OFET) is scarce.…”