Thin films of fluorinated 3d-metal phthalocyanines as chemical sensors of ammonia: An optical spectroscopy study

Abstract

Highlights-The sensor response of fluorinated metal phthalocyanines toward NH 3 was performed.-The sensor response was studied using surface plasmon resonance technique.-The effect of central metal in MPcF 16 molecule to the sensor response was verified.-The structure of analyte/phthalocyanine complex was analysed using DFT calculations.3 A comparative study of the sensor response toward gaseous ammonia of hexadecafluorinated 3d-metal phthalocyanine (MPcF 16 , M=Cu(II), Co(II), Zn(II), Ni(II)) thin films was performed using complementary experimental (viz., surface plasmon resonance, SPR, and IR absorption spectroscopy) along with theoretical (density functional theory calculations, DFT) techniques. SPR measurements revealed changes of both thickness and optical parameters (refraction indices and extinction coefficients) of the MPcF 16 films caused by adsorption of NH 3 . The MPcF 16 species studied exhibited the following order of sensor response: ZnPcF 16 > CoPcF 16  CuPcF 16 > NiPcF 16 . A good correlation was found between the DFT calculated (B3LYP/6-311++G(2df,p)) binding energies, experimentally measured shift of the selected IR bands, and the optical sensor response. Apart from this, we performed a detailed assignment of all intense bands in the vibrational spectra (IR and Raman) of fluorinated 3d-metal phthalocyanines studied.

Design of novel substituted phthalocyanines; synthesis and fluorescence, DFT, photovoltaic properties

“…This electronic structure adds interesting properties to the compound by providing delocalization [2]. In this context, solar cells [3,4], non-linear optics [5], chemical sensors [6], liquid crystals [7], laser dyes [8], photocatalytic [9], catalytic [10], photovoltaic [11], photochromic [12] and photodynamic therapy(PDT) [13,14] are being investigated extensively for obtaining photosensitive agents. Despite these wide uses, there are problems with phthalocyanines that need to be investigated.…”

Fabrication, characterization and gas sensing properties of gold nanoparticle and calixarene multilayers

“…The organic vapours are injected into the gas cell and left for 2 min to interact with the sensing layer. The interaction is based on the physical adsorption of the analyte molecules to the sensing layer surface and it is known to be reversible as has been published by many researchers [36][37][38][39]. The inset shows the kinetic response of the hybrid film obtained during two consecutive exposures of saturated vapour of chloroform, which shows clear reproduciblity of sensor response.…”

Tetrasubstituted (4-Chlorophenoxy)- And (2,4,5-Trichlorophenoxy)phthalocyanine Metal(ii) Complexes and Their Sulphonated Derivatives: Synthesis and Properties

“…In addition, aryloxy-substituted phthalocyanines containing halogen atoms are promising for use as an information storage devices 9-10 and sensors. [11][12] Based on the foregoing, the aim of this work was to the synthesis of tetra(4-chlorophenoxy) and tetra (2,4,5trichlorophenoxy)phthalocyaninates of copper(II), cobalt(II) or zinc(II) and sulfonic acids based on them, as well as to study of their properties.…”