Formation and characterisation of a self-assembled phthalocyanine monolayer suitable for gas sensing

Simpson, Tim R. E.; Russell, David A.; Chambrier, Isabelle; Cook, Michael J.; Horn, Andrew B.; Thorpe, S.C.

doi:10.1016/0925-4005(95)01706-2

Cited by 34 publications

(12 citation statements)

References 10 publications

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“…At the same time, thiolation of various organic substrates is a powerful tool for their further conjugation with nanoparticles, metal surfaces, etc. 28,29 Thiolated Pcs have been shown to be valuable components of such conjugates, acting as sensors, 30 photosensitizers, 31 hole injectors, 32 etc.…”

Section: Introductionmentioning

confidence: 99%

Optical limiters with improved performance based on nanoconjugates of thiol substituted phthalocyanine with CdSe quantum dots and Ag nanoparticles

et al. 2017

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Two alternative synthetic approaches affording a low-symmetry AB-type phthalocyanine 1 bearing two [2'-(2''-mercaptoethoxy)ethoxy] anchoring substituents were developed. Due to the presence of thiol groups, this phthalocyanine could be conjugated with TOPO-capped (TOPO - trioctylphosphine)-capped CdSe quantum dots (CdSe-QDs) or oleylamine capped silver nanoparticles (Ag-NPs). The nonlinear optical behaviour of starting phthalocyanine, quantum dots, nanoparticles and their conjugates was studied by using an open aperture Z-scan technique, revealing that the grafting of 1 onto the nanomaterials resulted in a significant enhancement of the optical limiting of 1-Ag and 1-CdSe in comparison with the individual components. The conjugate 1-CdSe, being the first example of Pc-based thiol conjugated with quantum dots, revealed superior limiting characteristics with a limiting threshold below 0.18 J cm.

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Section: Introductionmentioning

confidence: 99%

Optical limiters with improved performance based on nanoconjugates of thiol substituted phthalocyanine with CdSe quantum dots and Ag nanoparticles

et al. 2017

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“…Self-assembly represents a more efficient technique for fabricating electrodes based on CNT [8], [12] and [13] or MPc [14], [15], [16], [17], [18], [19] and [20] thin films compared to such other thin film formation methodologies such as drop-dry and spin coating.…”

Section: Introductionmentioning

confidence: 99%

“…When the molecular building blocks for SAMs are redox-active, as in this work, electrochemical techniques (notably cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS)) unlike other surface techniques provide more powerful insights into the surface coverage of the individual components, their adsorption strengths, chemical reactivities with redox probes and redox-active analytes, etc. [17], [18], [19], [20], [25], [42], [43], [44], [45] and [46]. Hence, in this work, we employed…”

Section: Introductionmentioning

confidence: 99%

“…The formation of self-assembled monolayers (SAMs) of organomolecules on gold surfaces has continued to attract considerable research interests due to their crucial importance in biology, chemistry and supramolecular nanotechnology. SAMs have been known to offer convenient model systems for probing the interfacial electron-transfer processes [24], [25], [26] and [27], and have been extensively studied in corrosion protection [24], [25], [26], [28] and [29], fabrication of electrochemical-and bio-sensors [15], [17], [18], [19], [20], [30], [31], [32] and [33] and molecular electronic devices [34] and [35].…”

Section: Introductionmentioning

confidence: 99%

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Insights into the surface and redox properties of single-walled carbon nanotube—cobalt(II) tetra-aminophthalocyanine self-assembled on gold electrode

Ozoemena

Nyokong

Nkosi

et al. 2007

Electrochimica Acta

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“…For example, the transmission spectrum of a SAM of 5a shows the in‐plane aromatic CH stretching vibrations. These are absent in the RAIR spectrum and this indicates that the Pc ring is oriented predominantly with the plane of the ring parallel to the surface 56,57…”

Section: : 1 Derivatives Deposited As Self‐assembled Monolayer (Sammentioning

confidence: 99%

Properties of Some Alkyl Substituted Phthalocyanines and Related Macrocycles

Cook

2002

The Chemical Record

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This report provides an account of research undertaken at the University of East Anglia, United Kingdom, into phthalocyanine derivatives substituted at six or more of the nonperipheral sites by alkyl groups. When first prepared they were only the second series of substituted phthalocyanines known to exhibit columnar liquid crystal behaviour. The compounds also form structured films by the spin-coating technique, a formulation with potential for FET devices. The zinc metallated derivatives are photosensitisers of singlet oxygen and show good potential for applications in photodynamic therapy. A mixed cyclotetramerisation of a 3,6-dialkylphthalonitrile with a second aromatic dinitrile forms so-called 3 : 1 phthalocyanines in which three of the benzenoid rings are substituted with two alkyl groups and the fourth is substituted differently. Appropriate substituents provide amphiphilic compounds that form well-ordered films by the Langmuir-Blodgett method and self-assembly techniques. Characterisation of the films using a variety of methods is discussed and applications described. Examples of 3 : 1 phthalocyanine-like macrocycles in which one of the benzenoid rings is replaced by a heterocycle extend the range of properties exhibited. These include broadband absorption in the near infrared and, in particular cases, edge-to-face dimerisation through coordination of a pyridine nitrogen to a zinc centre in a second macrocycle. The potential for using suitably functionalised 3 : 1 phthalocyanines as building blocks for more complex structures such as liquid crystalline main-chain polymeric phthalocyanines and phthalocyanino-dehydroannulenes is described.

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Formation and characterisation of a self-assembled phthalocyanine monolayer suitable for gas sensing

Cited by 34 publications

References 10 publications

Optical limiters with improved performance based on nanoconjugates of thiol substituted phthalocyanine with CdSe quantum dots and Ag nanoparticles

Optical limiters with improved performance based on nanoconjugates of thiol substituted phthalocyanine with CdSe quantum dots and Ag nanoparticles

Insights into the surface and redox properties of single-walled carbon nanotube—cobalt(II) tetra-aminophthalocyanine self-assembled on gold electrode

Properties of Some Alkyl Substituted Phthalocyanines and Related Macrocycles

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