Evidence map›Paper›PMID 40986099›Full record

ArticleJournal of molecular modeling2025

A nuclear chemical descriptor based on NMR databases for molecular information: characterization of π-conjugated oligomers.

João P C Oliveira, Murillo H Queiroz, Patricio F Provasi, Roberto Rivelino

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Article in Journal of molecular modeling, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

4 authors.

João P C OliveiraCentro de Ciência E Tecnologia Em Energia E Sustentabilidade, Universidade Federal Do Recôncavo da Bahia, Feira de Santana, Bahia, 44085-132, Brazil. joao.cavalcante@ufrb.edu.br.
Murillo H QueirozDepartamento de Físico-Química, Instituto de Química, Universidade Federal da Bahia, Rua Barão de Jeremoabo 147, Salvador, Bahia, 40170-115, Brazil.
Patricio F ProvasiDepartment of Physics, University of Northeastern, IMIT-CONICET. Av. Libertad 5500, W 3404 AAS, Corrientes, Argentina.
Roberto RivelinoInstituto de Física, Universidade Federal da Bahia, Salvador, Bahia, 40210-340, Brazil.

Funding

Consejo Nacional de Investigaciones Científicas y Técnicas 11220200100467COCoordenação de Aperfeiçoamento de Pessoal de Nível Superior,Brazil 001
6 · The paper itself

Abstract

contextStructure-property relationships of increasing systems, such as conjugated oligomers, atomic chains, and H-bonding networks, constitute a problem involving multiple variables in quantum chemical studies. Defining a single parameter that allows investigating different properties of these systems (or even those belonging to a specific chemical group) is not always a simple task. Thus, it is difficult to rationalize the evolution of molecular properties of increasing molecular systems, assigning relevant physicochemical information correlated to their size and structure. For conjugated oligomers, we have proposed a nuclear magnetic resonance (NMR)-based descriptor from the fluctuations of indirect spin-spin coupling constants (SSCCs) between two adjacent

methodsAll the oligomers, PPy(n), PFu(n), PTh(n), and PSe(n), with n = 2, 3, 5, 7, 9, and 11, respectively, were fully optimized, without symmetry constraints, using density-functional theory (DFT) at the PBE0/6-311 + G(d,p) level. Next, the vibrational properties were computed within harmonic approximation and NMR spin-spin coupling constants using the GIAO method. Finally, optical properties were obtained via TD-DFT with the CAM-B3LYP/6-311 + G(d,p) method.

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Computer simulationsConjugated systemsJ-coupling alternationNMR databasesStructure–property relationships

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.