Poly(Schiff base)s Containing 1,1′-Binaphthyl Moieties: Synthesis and Characterization

Grigoraş, Mircea; Catanescu, Carmen Otilia; Colotin, Georgiana

doi:10.1002/1521-3935(20010701)202:11<2262::aid-macp2262>3.0.co;2-7

Cited by 33 publications

(23 citation statements)

References 26 publications

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“…On the other hand, these features are also responsible for the low solubility of polyazomethines, hindering its processing, applications and even the study of their properties. The most employed strategies to improve solubility are the modification of the chain itself, like the insertion of lateral ramifications or flexible segments as alkyl or alkoxy groups along the backbone [5,[18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33]. Inserting bulky substituents act in separating or twisting the polymer chain [28], inserting flexibilizing groups such as ether or isopropyl bridges [13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and photophysical study of a conjugated–non-conjugated oligoazomethine

Machado

Neto

Atvars

et al. 2009

Journal of Luminescence

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Section: Introductionmentioning

confidence: 99%

Synthesis and photophysical study of a conjugated–non-conjugated oligoazomethine

Machado

Neto

Atvars

et al. 2009

Journal of Luminescence

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“…1). 18 All the metal salt solutions were prepared in doubly distilled water and solutions of different concentrations were made by serial dilution of the 0.1 M stock solutions. …”

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confidence: 90%

“…1). 18 All the metal salt solutions were prepared in doubly distilled water and solutions of different concentrations were made by serial dilution of the 0.1 M stock solutions. and allowed to evaporate for 24 h. Small disk shaped membranes were cut out and glued to one end of a hollow Pyrex glass tube using Araldite.…”

Section: Reagentsmentioning

confidence: 99%

A PVC Plasticized Sensor for Ni(II) Ion Based on a Simple Ethylenediamine Derivative

et al. 2006

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There has been a profound development in potentiometric sensors over the past 3 -4 decades, mainly thanks to their use in many fields like agriculture, industry, environment and pharmacy. The need for developing a sensor that is fast, accurate, reproducible and above all, selective to the ion of interest is the main reason for the quantum leap. The major challenge of research in this field has been in designing and subsequent syntheses of the different types of ionophores and this has been the thrust area of research. 1,2 Nickel monitoring has become quite essential mainly due to the material's toxic nature. It is a potent carcinogen and it causes acute pneumonitics, dermatitis, asthma, and nasal and lung cancer. 3,4 Nickel is present at low concentrations in hydrogenated oils, milk, and milk products and also in electroplating effluents. The conventional methods, such as the gravimetric method using dimethylglyoxime 5 or the spectrophotometric method, 6 are not only time consuming but also have some practical inconveniences. Though a number of ion selective electrodes are reported in the literature, 7-15 most of them are associated with one or other drawbacks like poor selectivity, narrow concentration range, non-Nernstian response, relatively long response time or poor reproducibility.In continuation to our work on metal analyses at trace levels, 16,17 this paper presents the fabrication of a PVC matrix membrane sensor incorporating a Schiff base as ionophore and its use in the determination of Ni(II). The proposed sensor could be effectively applied for direct determination of nickel content in real samples. Experimental ReagentsAll the reagents used were of analytical reagent grade. Dioctyl phthalate (DOP), dioctyl sebacate (DOS), dioctyl adipate (DOA), dimethyl sebacate (DMS), dibutyl phthalate (DBP) and sodium tetraphenylborate (NaTPB) were obtained from Lancaster (UK) and were used without any further purification. The metal salts, high relative molecular weight PVC, tetrakis[3,4-bis(trifluoromethyl)phenyl]borate and dibutyl sebacate (DBS) were purchased from Merck and used without any further purification. Tetrahydrofuran (THF) and oleic acid was purchased from S. D. Fine Chem, India and was distilled before use.The ionophore, N 1 ,N 2 -bis((naphthalen-1-yl)-methylene)ethane-1,2-diamine (NED), was synthesized and purified as described elsewhere (Fig. 1). 18 All the metal salt solutions were prepared in doubly distilled water and solutions of different concentrations were made by serial dilution of the 0.1 M stock solutions. Electrode preparationA mixture of PVC, plasticizer (DOP) and the anion excluder (NaTPB) in the ratio 31:65:2 (w/w%) was dissolved in 5 -7 mL of THF. To this mixture, the ionophore (2%) was added and the solution was mixed well. It was then poured into a petri dish A new PVC membrane ion selective electrode which is highly selective towards Ni(II) ions was constructed using a Schiff base containing a binaphthyl moiety as the ionophore. The sensor exhibited a good Nernstian response for...

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“…This in turn, has attracted a plethora of researches and studies in the synthesis of polyesters from diols and diacid chlorides by condensation polymerizations [1,2] . Synthesis of polymers with conjugative bonds including -C=N-and-C=C-in the main chain has grabbed researcher's interests for many years [3][4][5][6][7][8] . Generally, Schiff base bonds confers appropriate features such as; thermal stability, conductivity, liquid crystal properties and chelating effects to polymers [9,10] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of novel polyester containing Schiff-base unit

2015

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SbstractA new Schiff base type of polyester containing 2,2-dimethyl-1,3-diaminopropane was prepared by solution polycondensation of 1,4-benzenedicarbonyl dichloride with Bis(4-hydroxybenzilaldehid)-2,2-dimethyl-1,3-propildiimine (H 2 HB 2 P) which is derived from a 2,2-dimethyl-1,3-diaminopropane Schiff base reacted with a 4-hydroxybenzaldehyde monomer. The monomer and the polyester were characterized by FTIR, 1 HNMR, and elemental analysis. The prepared polyester showed inherent viscosity of 0.29 dl/g in NMP at 25 °C, indicating their moderate molecular weight. The Polyester was completely soluble in aprotic polar solvents such as N-methylpyrolidone (NMP), dimethylformamide (DMF), Dimethyl Acetamid (DMAC), dimthylsulfoxide (DMSO). TGA determined the 10% weight loss temperature (T 10 ) at 280 °C and residual weight at 600 °C ca. 41% under nitrogen atmosphere.

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Poly(Schiff base)s Containing 1,1′-Binaphthyl Moieties: Synthesis and Characterization

Cited by 33 publications

References 26 publications

Synthesis and photophysical study of a conjugated–non-conjugated oligoazomethine

Synthesis and photophysical study of a conjugated–non-conjugated oligoazomethine

A PVC Plasticized Sensor for Ni(II) Ion Based on a Simple Ethylenediamine Derivative

Synthesis and characterization of novel polyester containing Schiff-base unit

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