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Halogen-bonded self-assembly of mononuclear lanthanide(III) complexes: variable temperature photoluminescence study and sensing of nitroaromatics.

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Title: Halogen-bonded self-assembly of mononuclear lanthanide(III) complexes: variable temperature photoluminescence study and sensing of nitroaromatics.
Authors: Singh, Anil Rajnath1 (AUTHOR), Sil, Arnab2 (AUTHOR), Shivam, Kumar1 (AUTHOR), Poonia, Vishnu2 (AUTHOR), Thakur, Simran3 (AUTHOR), Nayak, Biswa Prakash3 (AUTHOR), Titi, Hatem M.4 (AUTHOR), Guchhait, Biswajit2 (AUTHOR) biswajit.guchhait@snu.edu.in, Patra, Ranjan1 (AUTHOR) rpatra@amity.edu
Source: Dalton Transactions: An International Journal of Inorganic Chemistry. 5/26/2026, Vol. 55 Issue 20, p7899-7909. 11p.
Subjects: Photoluminescence, Nitroaromatic compounds, Luminescence measurement, Fluorescent probes, Molecular self-assembly, Rare earth metals, Fluorophores
Abstract: A series of lanthanide complexes, [LnL2][Et3NH]·H2O [where Ln = Dy (1), Sm (2) and Gd (3), [H2L = 2-bis(2-hydroxy-3,5-dibromo benzyl)aminomethyl]pyridine], have been synthesized and characterized through various spectroscopic techniques, including UV-Vis and infrared spectroscopy, mass spectrometry, and single-crystal X-ray diffraction. The supramolecular interactions of the complexes were analysed through a computational study. The photoluminescence properties of complexes 1 and 2 have been investigated, showcasing the characteristic colourful emissions perceivable by the human visual system (yellow and orange, respectively). The correlated colour temperature study shows that 1 is almost invariant, ranging from 3400 to 3500 K, whereas for 2 , the values range from 7000 to 8000 K over the temperature range of 10–300 K. These emissive species are appropriate for the development of the colour point of white light and this could be useful for improvement of the brightness of display devices. Furthermore, the practical applicability of 1 was investigated as a fluorescent sensor for the sensitive detection of picric acid in a methanolic medium. Such complexes have potential applications in light-emitting devices and the sensing of molecular materials, and this research contributes to the growing interest in lanthanide-based materials for various technological applications, providing insights into their structural and photophysical properties. [ABSTRACT FROM AUTHOR]
Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Halogen-bonded self-assembly of mononuclear lanthanide(III) complexes: variable temperature photoluminescence study and sensing of nitroaromatics.
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  Data: <searchLink fieldCode="AR" term="%22Singh%2C+Anil+Rajnath%22">Singh, Anil Rajnath</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sil%2C+Arnab%22">Sil, Arnab</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shivam%2C+Kumar%22">Shivam, Kumar</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Poonia%2C+Vishnu%22">Poonia, Vishnu</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Thakur%2C+Simran%22">Thakur, Simran</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nayak%2C+Biswa+Prakash%22">Nayak, Biswa Prakash</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Titi%2C+Hatem+M%2E%22">Titi, Hatem M.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guchhait%2C+Biswajit%22">Guchhait, Biswajit</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> biswajit.guchhait@snu.edu.in</i><br /><searchLink fieldCode="AR" term="%22Patra%2C+Ranjan%22">Patra, Ranjan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> rpatra@amity.edu</i>
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  Data: <searchLink fieldCode="DE" term="%22Photoluminescence%22">Photoluminescence</searchLink><br /><searchLink fieldCode="DE" term="%22Nitroaromatic+compounds%22">Nitroaromatic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Luminescence+measurement%22">Luminescence measurement</searchLink><br /><searchLink fieldCode="DE" term="%22Fluorescent+probes%22">Fluorescent probes</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+self-assembly%22">Molecular self-assembly</searchLink><br /><searchLink fieldCode="DE" term="%22Rare+earth+metals%22">Rare earth metals</searchLink><br /><searchLink fieldCode="DE" term="%22Fluorophores%22">Fluorophores</searchLink>
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  Data: A series of lanthanide complexes, [LnL2][Et3NH]·H2O [where Ln = Dy (1), Sm (2) and Gd (3), [H2L = 2-bis(2-hydroxy-3,5-dibromo benzyl)aminomethyl]pyridine], have been synthesized and characterized through various spectroscopic techniques, including UV-Vis and infrared spectroscopy, mass spectrometry, and single-crystal X-ray diffraction. The supramolecular interactions of the complexes were analysed through a computational study. The photoluminescence properties of complexes 1 and 2 have been investigated, showcasing the characteristic colourful emissions perceivable by the human visual system (yellow and orange, respectively). The correlated colour temperature study shows that 1 is almost invariant, ranging from 3400 to 3500 K, whereas for 2 , the values range from 7000 to 8000 K over the temperature range of 10–300 K. These emissive species are appropriate for the development of the colour point of white light and this could be useful for improvement of the brightness of display devices. Furthermore, the practical applicability of 1 was investigated as a fluorescent sensor for the sensitive detection of picric acid in a methanolic medium. Such complexes have potential applications in light-emitting devices and the sensing of molecular materials, and this research contributes to the growing interest in lanthanide-based materials for various technological applications, providing insights into their structural and photophysical properties. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Dalton Transactions: An International Journal of Inorganic Chemistry is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1039/d6dt00274a
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        Text: English
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        PageCount: 11
        StartPage: 7899
    Subjects:
      – SubjectFull: Photoluminescence
        Type: general
      – SubjectFull: Nitroaromatic compounds
        Type: general
      – SubjectFull: Luminescence measurement
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      – SubjectFull: Fluorescent probes
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      – SubjectFull: Molecular self-assembly
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      – SubjectFull: Rare earth metals
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      – SubjectFull: Fluorophores
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      – TitleFull: Halogen-bonded self-assembly of mononuclear lanthanide(III) complexes: variable temperature photoluminescence study and sensing of nitroaromatics.
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              Text: 5/26/2026
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