A series of novel tetra-meso-thien-2-yl porphyrins were synthesised, and the effect of the variation in the thienyl
group on the photophysical properties were studied. Ground and excited state UV–vis absorption, steady-state
and time-resolved emission, resonance Raman spectroscopy, and cyclic voltammetry, were used to establish
the extent of electronic communication between the central Zn(II) porphyrin ring and the various meso-substituent groups. The properties of these novel thienyl porphyrins were compared to zinc tetraphenylporphyrin
(ZnTPP), to elucidate the effect of the position and number of thienyl rings. The photochemically-driven antimicrobial activity of zinc(II)-5,10,15,20-tetra(thien-2′
-yl)porphyrin (ZnThPP) as a coating, was established
against both Gram-positive and Gram-negative bacteria, and compared to ZnTPP. Visible irradiation of the
porphyrins results in a significant antimicrobial response.
Item Type:
Article (Published)
Refereed:
Yes
Additional Information:
Article number: 119
Uncontrolled Keywords:
Porphyrin; Thiophene; Photophysical; Electrochemistry; Raman; Singlet oxygen; Antimicrobial