Synthesis, characterization, spectroscopy and thermal analysis of rare earth picrate complexes with L-leucine

Martins, Tereza da Silva; Matos, Jivaldo do Rosário; Vicentini, G.; Isolani, Paulo Celso

doi:10.1007/s10973-005-7309-0

Cited by 16 publications

(6 citation statements)

References 38 publications

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“…Bulk Leu simply sublimes with a maximum at 253 °C under our conditions (Figure , curve b’) as reported by others: on‐line MS analysis of gases evolved during TG did not reveal any signals at masses 44 (CO 2 ), 46 (NO 2 ), or 18 (H 2 O), that accompany decomposition or polymerization reactions. Leu/SiO 2 (curve a′) is characterized by a single peak in the low temperature region, centered at 150 °C.…”

Section: Resultssupporting

confidence: 86%

One Step up the Ladder of Prebiotic Complexity: Formation of Nonrandom Linear Polypeptides from Binary Systems of Amino Acids on Silica

Sakhno

Battistella

Mezzetti

et al. 2018

Chemistry A European J

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Evidence for the formation of linearo ligopeptides with nonrandoms equences from mixtures of amino acids coadsorbed on silica ands ubmitted to as imple thermal activation is presented. The amino acid couples (glutamic acid + leucine)a nd (aspartic acid + valine) were deposited on a fumed silica and submitted to as ingle heating step at moderate temperature. The evolution of the systemsw as characterized by X-ray diffraction, infrared spectroscopy,t hermosgravimetric analysis, HPLC, and electrospray ionizationm ass spectrometry (ESI-MS). Evidence for the formation of amide bonds was found in all systemss tudied. Whilet he products of single aminoa cids activation on silica could be consid-ered as evolutionary dead ends, (glutamic acid + leucine) and, at to somee xtent, (aspartic acid + valine) gave rise to the high yield formation of linear peptides up to the hexamers. Oligopeptides of such length have not been observed beforei ns urface polymerization scenarios (unless the amino acids had been depositedb yc hemical vapor deposition, which is not realistic in ap rebiotic environment). Furthermore,n ot all possible amino acid sequences werep resent in the activation products,w hich is indicative of polymerization selectivity.These resultsare promisingf or origins of life studies because they suggest the emergence of nonrandom biopolymers in as imple prebiotic scenario.

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Section: Resultssupporting

confidence: 86%

One Step up the Ladder of Prebiotic Complexity: Formation of Nonrandom Linear Polypeptides from Binary Systems of Amino Acids on Silica

Sakhno

Battistella

Mezzetti

et al. 2018

Chemistry A European J

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“…There have been various studies on the sublimation and decomposition of L-leucine. For instance, Martins et al (38) found that L-leucine sublimed at 251°C when measured with DSC, whereas the sublimation was observed at 290°C by thermogravimetric analysis (TGA). In contrast, Li et al (39) reported that sublimation took place at 295°C (DSC) followed by decomposition at 303°C (TGA).…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Investigations on the Humidity-Induced Transformations of Salbutamol Sulphate Particles Coated with l-Leucine

Raula¹,

Thielmann

Kansikas

et al. 2008

Pharm Res

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“…Investigations of luminescent lanthanide complexes in solution bearing different applications were also reported in the literature [231][232][233][234]. Other investigations on the luminescence properties of lanthanide-based systems with NPs, nanorods or systems assembled using sol-gel techniques have been reported in the literature [17,22,27,33,34,38,40,43,45,49,50,60,61,67,73,78,82,88,93,107,[127][128][129]133,136,140,142,143,149,163,[169][170][171]176,178,201,211,212,214,[235][236][237][238][239]…”

Section: Nanoparticles Nanorods and Sol-gel Processmentioning

confidence: 96%

Recent advances in lanthanide spectroscopy in Brazil

Silva

Capelo

Albuquerque

2016

Journal of Luminescence

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a b s t r a c tThis rev Q2 iew discusses recent advances in lanthanide spectroscopy involving luminescence applications carried out in Brazil. The revised topics include glasses, sol-gel, light-emitting diodes, nanoparticles, metal-organic frameworks, coordination polymers, thin films, energy transfer processes, upconversion and development of new theoretical tools. The important role played by Prof. Oscar L. Malta on this subject is evidenced by his many contributions to the broad range of investigations reported here and this review is dedicated to him, on the occasion of his 60th birthday.& 2015 Published by Elsevier B.V.

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Synthesis, characterization, spectroscopy and thermal analysis of rare earth picrate complexes with L-leucine

Cited by 16 publications

References 38 publications

One Step up the Ladder of Prebiotic Complexity: Formation of Nonrandom Linear Polypeptides from Binary Systems of Amino Acids on Silica

One Step up the Ladder of Prebiotic Complexity: Formation of Nonrandom Linear Polypeptides from Binary Systems of Amino Acids on Silica

Investigations on the Humidity-Induced Transformations of Salbutamol Sulphate Particles Coated with l-Leucine

Recent advances in lanthanide spectroscopy in Brazil

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