A Benzimidazo[1,2-c]quinazoline Derivative as a Precursor for Schiff Base Cu(II) Complex: Synthesis, Spectroscopic and Photophysical Insights

Duygu Palabıyık

doi:10.18596/jotcsa.1937127

A Benzimidazo[1,2-c]quinazoline Derivative as a Precursor for Schiff Base Cu(II) Complex: Synthesis, Spectroscopic and Photophysical Insights

Abstract

In this work, a benzimidazo[1,2-c]quinazoline derivative (3) was synthesized and shown to act as a versatile precursor that can be transformed into a Schiff base upon coordination with Cu(II), yielding the corresponding Cu(II) complex 4b. The influence of this metal coordination on photophysical properties was subsequently investigated. The full characterization data for compound 3 were obtained using MALDI-TOF MS, 1H and 13C NMR (1D and 2D), FT-IR, and elemental analysis. In addition, the crystal structure of 3 was elucidated by the single-crystal X-ray diffraction method for the first time. The structure of Cu(II) complex 4b was proposed and supported by spectroscopic methods (MALDI-TOF MS, FT-IR) and elemental analysis. The photophysical properties of the targeted compounds (3 and 4b) were investigated using UV-Vis and fluorescence spectroscopies in various organic solvents, and their results were compared. In addition, thermogravimetric analyses of compound 3 and Cu(II) complex 4b were performed to evaluate the contribution of metal coordination to thermal stability.

Keywords

Thanks

The author gratefully acknowledges Assoc. Prof. Ceylan M. Balcı for their valuable help with single-crystal X-ray analysis data.

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Details

Primary Language

English

Subjects

Transition Metal Chemistry

Journal Section

Research Article

Authors

Duygu Palabıyık ^*
0000-0002-3198-6955
Türkiye

Publication Date

August 26, 2026

Submission Date

April 24, 2026

Acceptance Date

June 9, 2026

Published in Issue

Year 2026 Volume: 2026 Number: 2

DOI

https://doi.org/10.18596/jotcsa.1937127

IZ

https://izlik.org/JA64GM24UA

Cite

RIS / Bibtex

APA

Palabıyık, D. (2026). A Benzimidazo[1,2-c]quinazoline Derivative as a Precursor for Schiff Base Cu(II) Complex: Synthesis, Spectroscopic and Photophysical Insights. Journal of the Turkish Chemical Society Section A: Chemistry, 2026(2), 1-18. https://doi.org/10.18596/jotcsa.1937127

AMA

1.Palabıyık D. A Benzimidazo[1,2-c]quinazoline Derivative as a Precursor for Schiff Base Cu(II) Complex: Synthesis, Spectroscopic and Photophysical Insights. JOTCSA. 2026;2026(2):1-18. doi:10.18596/jotcsa.1937127

Chicago

Palabıyık, Duygu. 2026. “A Benzimidazo[1,2-C]quinazoline Derivative As a Precursor for Schiff Base Cu(II) Complex: Synthesis, Spectroscopic and Photophysical Insights”. Journal of the Turkish Chemical Society Section A: Chemistry 2026 (2): 1-18. https://doi.org/10.18596/jotcsa.1937127.

EndNote

Palabıyık D (August 1, 2026) A Benzimidazo[1,2-c]quinazoline Derivative as a Precursor for Schiff Base Cu(II) Complex: Synthesis, Spectroscopic and Photophysical Insights. Journal of the Turkish Chemical Society Section A: Chemistry 2026 2 1–18.

IEEE

[1]D. Palabıyık, “A Benzimidazo[1,2-c]quinazoline Derivative as a Precursor for Schiff Base Cu(II) Complex: Synthesis, Spectroscopic and Photophysical Insights”, JOTCSA, vol. 2026, no. 2, pp. 1–18, Aug. 2026, doi: 10.18596/jotcsa.1937127.

ISNAD

Palabıyık, Duygu. “A Benzimidazo[1,2-C]quinazoline Derivative As a Precursor for Schiff Base Cu(II) Complex: Synthesis, Spectroscopic and Photophysical Insights”. Journal of the Turkish Chemical Society Section A: Chemistry 2026/2 (August 1, 2026): 1-18. https://doi.org/10.18596/jotcsa.1937127.

JAMA

1.Palabıyık D. A Benzimidazo[1,2-c]quinazoline Derivative as a Precursor for Schiff Base Cu(II) Complex: Synthesis, Spectroscopic and Photophysical Insights. JOTCSA. 2026;2026:1–18.

MLA

Palabıyık, Duygu. “A Benzimidazo[1,2-C]quinazoline Derivative As a Precursor for Schiff Base Cu(II) Complex: Synthesis, Spectroscopic and Photophysical Insights”. Journal of the Turkish Chemical Society Section A: Chemistry, vol. 2026, no. 2, Aug. 2026, pp. 1-18, doi:10.18596/jotcsa.1937127.

Vancouver

1.Duygu Palabıyık. A Benzimidazo[1,2-c]quinazoline Derivative as a Precursor for Schiff Base Cu(II) Complex: Synthesis, Spectroscopic and Photophysical Insights. JOTCSA. 2026 Aug. 1;2026(2):1-18. doi:10.18596/jotcsa.1937127

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The words Scheme 1, Figure 1, etc., will have a full stop at the end of the caption. The caption text will be centered on the page.

Supplementary information: The authors are encouraged to use supplementary information, for detailing the study with spectral data, crystal structure refinement data, and other types of material should you recommend including. All types of synthetic procedures will be included in the main text. Supplementary files will be added as a new file by the editors.

Usage of the units: The units will be, where possible, SI-based and the style g/mL will be preferred over g.mL-1. Please do not mix these two and apply consistency throughout the manuscript about using the units.

1. Publication Ethics

The Journal of the Turkish Chemical Society Section A: Chemistry (JOTCSA) is committed to maintaining the highest standards of publication ethics and follows the principles and best practice guidelines of the Committee on Publication Ethics (COPE). All parties involved in the publication process—including authors, editors, reviewers, and the publisher—are expected to adhere to these ethical standards.

The journal does not tolerate plagiarism, data fabrication, data falsification, duplicate publication, inappropriate authorship, or any other form of research or publication misconduct. Suspected ethical violations are handled in accordance with COPE guidelines.

2. Editorial Responsibilities

The Editor-in-Chief has overall responsibility for the editorial management of the journal. Manuscripts are assigned to Section Editors (please see the Editorial Board page for details), who oversee the peer-review process and make recommendations based solely on scientific merit.

Editors evaluate submissions objectively without discrimination based on race, gender, nationality, institutional affiliation, or personal beliefs. Editorial decisions are based on originality, scientific quality, methodological soundness, ethical compliance, and relevance to the journal's scope.

Editors maintain the confidentiality of submitted manuscripts and avoid handling manuscripts in which they have conflicts of interest.

3. Author Responsibilities

Authors are responsible for submitting original research that has not been published previously and is not under consideration elsewhere.

All listed authors must have made substantial scientific contributions to the work and approve the final version of the manuscript before submission.

Authors are responsible for the accuracy of the data presented and must disclose any financial or non-financial conflicts of interest. Any errors identified after publication should be reported promptly to the editorial office.

4. Reviewer Responsibilities

Reviewers provide independent, objective, and constructive evaluations of submitted manuscripts.

Reviewers should accept review invitations only when they have the appropriate expertise and can complete the review within the requested timeframe. Manuscripts under review must be treated as confidential documents.

Reviewers should disclose any potential conflicts of interest and decline the review if such conflicts could affect their impartiality.

5. Peer Review Process

JOTCSA operates a double-blind external peer-review system.

Following an initial editorial screening, each manuscript is assigned by the Editor-in-Chief to a Section Editor, who manages the peer-review process.

The Section Editor invites at least two independent external reviewers with expertise in the manuscript's subject areas. Reviewers are selected based on their scientific expertise and must have no conflicts of interest with the authors. Reviewers are not selected from the same institution as the corresponding author whenever possible.

The Section Editor oversees the review process but does not normally act as a reviewer. Editorial decisions are based on reviewers' reports, the editor's evaluation, and the scientific quality of the manuscript.

Possible editorial decisions include:

Accept
Minor Revision
Major Revision
Reject

6. Research Ethics (Human & Animal Studies)

Research involving human participants or animals must comply with internationally accepted ethical standards and applicable national regulations.

Studies involving human participants must have received approval from an appropriate ethics committee and be conducted in accordance with the Declaration of Helsinki. Informed consent must be obtained where applicable.

Studies involving animals must have received approval from the relevant institutional animal ethics committee and comply with internationally recognized guidelines for animal welfare.

Authors should provide ethics approval information within the manuscript.

7. Conflicts of Interest

Authors, editors, and reviewers must disclose any financial, professional, or personal relationships that could influence the objectivity of the publication process.

Authors should include a Conflict of Interest Statement in their manuscripts. If no conflicts exist, authors should state:

The authors declare no conflict of interest.

Editors and reviewers with conflicts of interest will not participate in the editorial or peer-review process for the affected manuscript.

8. Plagiarism and Similarity Checks

All submitted manuscripts undergo similarity screening using plagiarism detection software before peer review.

Similarity reports are evaluated by the editorial team. A similarity score alone does not determine editorial decisions; editors assess the nature, extent, and context of any textual overlap.

Manuscripts containing plagiarism, duplicate publication, manipulated images, or other forms of publication misconduct will be rejected or, if already published, handled according to COPE recommendations.

9. Corrections, Retractions and Expressions of Concern

The journal follows COPE recommendations for post-publication corrections.

Corrections may be published when errors affecting the accuracy or clarity of a published article are identified.

Retractions are issued when findings are shown to be unreliable due to major errors or research misconduct, including fabrication, falsification, plagiarism, duplicate publication, or unethical research.

Expressions of Concern may be published when serious concerns arise regarding a published article but conclusive evidence is not yet available.

All corrections, retractions, and editorial notices are permanently linked to the original article to maintain the integrity of the scholarly record.

10. Copyright & Licensing

Authors retain copyright of their published work.

Articles published in JOTCSA are distributed under the Creative Commons Attribution–NonCommercial–NoDerivatives 4.0 International (CC BY-NC-ND 4.0) license.

This license permits users to copy and redistribute the material in any medium or format for non-commercial purposes, provided appropriate credit is given to the original authors and source, no modifications are made, and the license terms are respected.

Editor-in-Chief

Hasan KÜÇÜKBAY

Organic Chemistry

Section Editor: Analytical Chemistry

F. Zehra KÜÇÜKBAY

Pharmaceutical Analytical Chemistry, Analytical Spectrometry, Instrumental Methods, Separation Science

Section Editor: Biochemistry

ST

Sevim TUNALI

Medicinal and Biomolecular Chemistry (Other)

Simla OLĞAÇ

Pharmacology and Pharmaceutical Sciences, Pharmaceutical Biochemistry, Molecular Medicine

Section Editor: Computational Chemistry

Fatih Mehmet AVCU

Deep Learning, Supervised Learning, Machine Learning Algorithms, Analytical Chemistry, Analytical Spectrometry, Theoretical and Computational Chemistry

Houssem BOULEBD

Organic Chemical Synthesis, Free Radical Chemistry, Computational Chemistry

Tugba TAŞKIN TOK

Bioinformatics and Computational Biology, Pharmaceutical Chemistry, Bioinorganic Chemistry, Nanochemistry, Organic Chemistry, Natural Products and Bioactive Compounds, Theoretical and Computational Chemistry (Other), Medicinal and Biomolecular Chemistry, Biomolecular Modelling and Design

Section Editor: Crystallography

Sibel Demir KANMAZALP

Molecular Docking, Crystallography, Physical Organic Chemistry, Computational Chemistry, Theoretical and Computational Chemistry (Other)

Section Editor: Electrochemistry

Yücel KADIOGLU

Pharmaceutical Analytical Chemistry, Analytical Spectrometry, Instrumental Methods, Metabolomic Chemistry

Section Editor: Food Chemistry

Özge SÜFER

Food Sciences, Food Chemistry and Food Sensory Science, Grain Technology, Drying Technologies, Basic Food Processes

Section Editor: Forensic Chemistry

Orhan DESTANOĞLU

Analytical Spectrometry, Instrumental Methods, Quality Assurance, Chemometrics, Traceability and Metrological Chemistry, Analytical Chemistry (Other), Forensic Chemistry

Section Editor: Inorganic Chemistry

Dursun Ali KÖSE

Chemical Sciences, Inorganic Chemistry, Non-Metal Chemistry, Main Group Metal Chemistry, Bioinorganic Chemistry, F-Block Chemistry, Transition Metal Chemistry, Inorganic Green Chemistry, Solid State Chemistry, Crystallography, Metal Cluster Chemistry, Metal Organic Frameworks, Inorganic Chemistry (Other), Forensic Chemistry, Water Treatment Processes

Altuğ Mert SEVIM

Catalysis and Mechanisms of Reactions, Inorganic Chemistry, Transition Metal Chemistry, Inorganic Materials, Photovoltaic Devices (Solar Cells), Solar Energy Systems

Section Editor: Organic Chemistry

Davit JISHKARIANI

Nanochemistry, Supramolecular Chemistry, Organic Chemical Synthesis, Materials Science and Technologies

FC

Fabrizio CARTA

Characterisation of Biological Macromolecules, Biologically Active Molecules, Medicinal and Biomolecular Chemistry (Other), Health Sciences

Melike KALKAN

Analytical Spectrometry, Catalysis and Mechanisms of Reactions, Organic Chemistry

Hasan KÜÇÜKBAY

Organic Chemistry

Section Editor: Pharmaceutical chemistry

Anıl YILMAZ

Pharmacognosy, Pharmaceutical Chemistry, Natural Products and Bioactive Compounds, Organic Chemical Synthesis, Medicinal and Biomolecular Chemistry (Other)

Manisha PATIL

Pharmaceutical Chemistry

Section Editor: Photochemistry

Baybars KÖKSOY

Photochemistry, Organic Chemistry

Mücahit ÖZDEMIR

Chemical Sciences, Inorganic Chemistry (Other)

Section Editor: Physical Chemistry

Sinem GOKTURK

Chemical Sciences, Analytical Spectrometry, Physical Chemistry, Solution Chemistry, Colloid and Surface Chemistry, Reaction Kinetics and Dynamics, Physical Chemistry (Other)