Preparation of Zn porphyrin‐functionalized polystyrene and the fluorescence quenching of it by terbuthylazine

Abstract

Zinc tetraphenylporphyrin (ZnPP) was bond on the side chains of linear chloromethylated polystyrene (CMPS) through Friedel–Crafts alkylation reaction, and the metalloporphyrin‐functionalized polystyrene (ZnPP/PS) was obtained successfully. Its chemical structure was characterized with FTIR. And the effects of various factors on the bonding reaction of ZnPP had been investigated in detail. In addition, the photophysical properties of ZnPP/PS were studied by means of UV‐Vis spectroscopy and fluorescence spectroscopy. The research results show that ZnPP/PS could be prepared favorably through Friedel–Crafts alkylation reaction between ZnPP and CMPS, and the most bonding degree of ZnPP on PS is up to 7% under the condition of the temperature 25°C and 0.1 mL of SnCl4 lasting 8 h. Moreover, ZnPP/PS show the characteristic photophysical behavior similar to ZnPP. ZnPP moieties in ZnPP/PS interact with terbuthylazine (TBA) and form a complex with a red‐shift of Q‐band of absorbance peak from 559 to 565 nm. Especially TBA quenches ZnPP/PS emission intensity at 610 and 662 nm when excites at 423 nm. The TBA‐ZnPP/PS complex is formed in the ground state and TBA is bonded to the excited state of ZnPP/PS simultaneously on the basis of a non‐linear Stern–Volmer plot indicative of the combined dynamic and static quenching. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40516.

Sonication‐induced self‐assembly of polymeric porphyrin–fullerene: Formation of nanorings

“…This means that more electronic interactions were expected in the spherical morphology as compared to the rings (two‐dimensional), and this caused a greater hypsochromic shift in the absorption spectra. Similarly, the fluorescence emission spectra of the maiden MPPS solution was quenched on complexation with polymeric fullerene, and the order of fluorescence quenching was identical with that of absorption magnitudes; this confirmed the complexation of porphyrin and fullerene, as shown in Figure (B).…”

Spectral characterizations and photophysical properties of one-step synthesized blue fluorescent 4′-aryl substituted 2,2′:6′,2′′-terpyridine for OLEDs application

“…These red-shifts can be attributed to the rate of electron donor ability of substituents in the terpyridine. It is clear that the increased red-shift of 66 nm in C-3 compound is due to the high electron donating nature of the trimethoxypheny substituent in the terpyridine [35,36]. This can be confirmed by calculating highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels from the electrochemical studies, as shown in Table-1.…”

Biocompatible 3D Printed Microneedles for Transdermal, Intradermal, and Percutaneous Applications

“…In the case of PDMS, the elasticity modulus is linearly dependent on the crosslinking ratio [41] (from 5:1 to 33:1), with values between 3.6 and 56 MPa, respectively. [41] We used a crosslinking ratio of 10:1 (base/curing agent) to prepare PDMS skins (Sylgard 184 Silicone Elastomer, Dow Corning Corp., Midland, MI, USA), corresponding to an elasticity modulus of 2.6 MPa, which is about an order of magnitude higher than the Young's modulus of human skin. Using the Electromechanical Testing System, a single MN was attached to the indenter, and a PDMS skin was placed on top of a support, as shown in Figure 1.…”