Investigation of the reaction of copper(I) with 2,9-dimethyl-1,10-phenanthroline at trace level by thermal lensing

Проскурнин, М. А.; Chernysh, V. V.; Pakhomova, Svetlana; Kononets, Mikhail; Sheshenev, Andrey E.

doi:10.1016/s0039-9140(02)00128-5

Cited by 23 publications

(8 citation statements)

References 20 publications

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“…The use of lasers to study photophysics processes presents some advantages when compared to conventional spectroscopy, since its specific wavelength and energy density are higher than other light sources. The thermal lens (TL) method is a precise spectroscopic tool for material characterization, − ,− ,− especially because of its high sensitivity that overcomes the limits of traditional transmittance spectroscopy. This method has been used in a wide range of applications, such as trace analysis ,− and flow injection, characterization of chemical reactions, − ,, and determination of fluorescence quantum efficiency. − Despite this range of applications, a large number of approximations are usually employed in the analytical treatment of the effects occurring during laser excitation and relaxation processes.…”

Section: Introductionmentioning

confidence: 99%

Role of Photophysics Processes in Thermal Lens Spectroscopy of Fluids: A Theoretical Study

et al. 2014

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Photophysics processes are ubiquitous in nature and difficult to be quantitatively characterized by conventional spectroscopy. Alternatively, pump-probe methods have been widely applied to study these complex processes. In this context, the thermal lens technique is a precise spectroscopic tool for material characterization and presents a wide range of applications in chemical analysis. Here, we present an all numerical approach to analyze the dynamics of photophysics processes and to identify the role of individual contributions of photoreaction and mass diffusion in the thermal lens experiments. The results are essential for a proper understanding of the dominant physical mechanisms in laser-induced photodegradation, which allow precise data analysis of the effects in photosensitive fluids.

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Section: Introductionmentioning

confidence: 99%

Role of Photophysics Processes in Thermal Lens Spectroscopy of Fluids: A Theoretical Study

et al. 2014

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“…[12] However, we fo-cused on the 5-or 6-position to obtain the desired metallosupramolecular polymer, because the coordination ability of 2,9-unsubstituted phenanthroline metal complexes is higher than that of 2,9-substituted phenanthroline metal complexes owing to steric hindrance, and a linear polymer structure is expected. [13] With the aim to generate a green metallo-supramolecular polymer, we designed, synthesized, and characterized a novel copper-based metallo-supramolecular polymer as a green ECM.The bis(1,10-phenanthroline) ligand with fluorene as a spacer, L1, and 1,10-phenathroline ligand, L2, were synthesized as shown in Scheme 1. 5-Bromo-1,10-phenanthroline was synthesized in the same manner as a previously reported procedure, [14] which is a useful protocol for the synthesis of the new ligands L1 and L2.…”

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A Green Copper‐Based Metallo‐Supramolecular Polymer: Synthesis, Structure, and Electrochromic Properties

Hossain

Sato

Higuchi

2012

Chemistry An Asian Journal

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Electrochromism is defined as a reversible and visible change in the transmittance of a material as a result of a redox reaction. [1] Electrochromic materials (ECMs) have received widespread interest for optical and electronic applications, such as smart windows and electronic papers. [2] Conducting polymers, [3] molecular dyes, [4] and metal oxides [3,5] are frequently investigated as ECM candidates. In contrast, only a few studies on metallo-supramolecular polymers as ECMs have been reported. [6] Metallo-supramolecular polymers are easily formed by the complexation of metal ions with an organic molecule that bears two coordination sites. [7] Recently, we have reported two metallo-supramolecular polymers, which are formed by complexation of Fe II or Ru II metal ion with bisterpyridine ligands that have specific blue and red colors, respectively, based on the metal-to-ligand charge transfer (MLCT) absorption. We also showed that their electrochromic properties were caused by an electrochemical redox reaction of their metal ions. [8] Three basic colors such as, red, green, and blue (RGB), are required to realize the electrochromic type of an electronic paper. However, to the best of our knowledge, a green metallo-supramolecular polymer derived from bis-terpyridine ligands has not been reported. To obtain a linear polymer structure, the type of metal species that can be used in the formation of metal complexes with terpyridines is limited because terpyridines can form an octahedral coordinated 2:1 complex with metal ions such as Fe, Ru, and Co. [9] However, Cu II ions generally form tetrahedral coordinated structures with bidentate ligands, such as 1,10-phenanthroline (phen) or bipyridine ligands, and also Cu II complexes are known to be green. [10] In particular, 1,10-phenanthroline is one of the most effective ligands because it has a high binding affinity to metal ions. [11] A coordination polymer constructed from Cu I complexes that is based on the 2-or 9-position linking a bis(1,10-phenanthroline) ligand with a rigid spacer (4,4"-bisA C H T U N G T R E N N U N G (9-aryl)-2-o-phenanthrolinyl)-2',5'-dihexyl-p-terphyl) was reported by Rehahn and co-workers. [12] However, we fo-cused on the 5-or 6-position to obtain the desired metallosupramolecular polymer, because the coordination ability of 2,9-unsubstituted phenanthroline metal complexes is higher than that of 2,9-substituted phenanthroline metal complexes owing to steric hindrance, and a linear polymer structure is expected. [13] With the aim to generate a green metallo-supramolecular polymer, we designed, synthesized, and characterized a novel copper-based metallo-supramolecular polymer as a green ECM.The bis(1,10-phenanthroline) ligand with fluorene as a spacer, L1, and 1,10-phenathroline ligand, L2, were synthesized as shown in Scheme 1. 5-Bromo-1,10-phenanthroline was synthesized in the same manner as a previously reported procedure, [14] which is a useful protocol for the synthesis of the new ligands L1 and L2. The desired L1 was prepared by Suzuki ...

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“…The Cu(I)-NC complex has high stability constant [8]. The complexation ratio of Cu(I)-NC is 1:2 with an optimum pH of 7 [9].…”

Section: ■ Introductionmentioning

confidence: 99%

A New Flow Injection System with Merging-Zone Technique for the Determination of Copper(II) by Neocuproine Reagent in Aqueous Solution

Farhood

Taha

2022

Indones. J. Chem.

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A fast, simple, and high throughput sample merging-zone flow injection design was developed to determine copper(II) in aqueous solution. The procedure is based on the reduction of copper(II) to copper(I) by uric acid followed by a direct reaction with Neocuproine reagent (NC). The orange-yellow complex that forms absorb light at 454 nm. All conditions of the new flow injection unit were investigated. The analytical curve of copper(II) was linear with (r2) value of 0.9978, in the range of 0.4 to 40 mg/L with a detection limit of 0.1 mg/L and a quantification limit of 0.3 mg/L. the molar absorptivity was 1.661 × 105 L/mol cm and the recovery range was between 104.9 and 97%. The homemade acrylic valve was low-cost with zero dead volume and high repeatability (n = 7) with an RSD of 2.31%. The dispersion coefficient values were 1.8,1.62, and 1.31 for the concentrations of 5, 15, and 25 mg/L, respectively. The sample throughput was 69 h–1.

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Investigation of the reaction of copper(I) with 2,9-dimethyl-1,10-phenanthroline at trace level by thermal lensing

Cited by 23 publications

References 20 publications

Role of Photophysics Processes in Thermal Lens Spectroscopy of Fluids: A Theoretical Study

Role of Photophysics Processes in Thermal Lens Spectroscopy of Fluids: A Theoretical Study

A Green Copper‐Based Metallo‐Supramolecular Polymer: Synthesis, Structure, and Electrochromic Properties

A New Flow Injection System with Merging-Zone Technique for the Determination of Copper(II) by Neocuproine Reagent in Aqueous Solution

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