Evidence map›Paper›PMID 33162643›Full record

ArticleOptical and quantum electronics2020

Determination of the structural, electronic, optoelectronic and thermodynamic properties of the methylxanthine molecules theophylline and theobromine.

G W Ejuh, J M B Ndjaka, F Tchangnwa Nya, P L Ndukum, C Fonkem, Y Tadjouteu Assatse, R A Yossa Kamsi

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Article in Optical and quantum electronics, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
0.3field-weighted citation impact, top 51% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

5 citing papers in PubMed, 13 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 1 country.

G W EjuhDepartment of Electrical and Electronic Engineering, National Higher Polytechnic Institute, University of Bamenda, P. O. Box 39, Bambili, Cameroon.
J M B NdjakaDepartment of Physics, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaounde, Cameroon.
F Tchangnwa NyaDepartment of Physics, Faculty of Science, University of Maroua, P.O. Box 814 Maroua, Cameroon.
P L NdukumDepartment of Computer Engineering, National Higher Polytechnic Institute, University of Bamenda, P. O. Box 39, Bambili, Cameroon.
C FonkemDepartment of Physics, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaounde, Cameroon.
Y Tadjouteu AssatseDepartment of Physics, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaounde, Cameroon.
R A Yossa KamsiDepartment of Physics, Faculty of Science, University of Yaoundé I, P.O. Box 812, Yaounde, Cameroon.
Université de Yaoundé I · CMUniversity of Bamenda · CMUniversity of Maroua · CM

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

RHF and DFT (wB97XD and B3LYP) methods with the 6-31++G** basis set have been used to study structural, optoelectronic and thermodynamic properties of Theophylline and Theobromine. Dipole moment, average polarizability, anisotropy, first-order molecular hyperpolarizability, second-order molecular polarizability, HOMO and LOMO energy gap, molar refractivity, chemical hardness, chemical softness, electronic chemical potential, electronegativity, electrophilicity index, dielectric constant, electric susceptibility, refractive index and their thermodynamic properties have equally been calculated. To understand the vibrational analysis of our system, IR and RAMAN frequencies were calculated and described. Results reveal that molecules can have applications in linear and nonlinear optical devices, photonic devices and in molecular electronics. Equally, from dipole moment, average polarizability, anisotropy, first-order molecular hyperpolarizability, second-order molecular polarizability, HOMO and LOMO energy gap, molar refractivity, chemical hardness, chemical softness, electronic chemical potential, electronegativity, electrophilicity index and literature we suggest that Theophylline and Theobromine be consider as candidates for the treatment of COVID-19 and other respiratory diseases.

Indexed as

Linear and nonlinear optical propertiesMethyxanthinesMolecular electronicsOptoelectronicsThermodynamic properties

Identifiers

PMID33162643
PMCPMC7603795
OpenAlexW3097679526

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.