Regioisomer-dependent room-temperature phosphorescence and low-k dielectric properties of naphthalene-bridged organoboranes.
4 affiliations
- 1Tata Institute of Fundamental Research Hyderabad-500046 India [email protected].
- 2Department of Inorganic and Physical Chemistry, Indian Institute of Science Bangalore-560012 India [email protected].
- 3Department of Chemistry, Indian Institute of Technology Tirupati-517 619 India.
- 4Nanoelectronics and Device Physics Lab, School of Physical Sciences, National Institute of Science Education and Research, An OCC of HBNI Bhubaneswar Odisha-752050 India [email protected].
Abstract
Long-lasting room-temperature phosphorescence (RTP) from organic molecules bearing lone-pair-containing heteroatoms has recently emerged. However, designing lone-pair-free molecules with "tunable RTP" remains challenging. Herein, we present "fine-tunable RTP" from boron-containing regioisomers (1-4), that exhibit efficient orange-to-green RTP emission (600 to 515 nm) and ΦPh% (1.8 to 6.7) with delayed lifetimes ranging from 27 to 302 ms in the molecularly dispersed state (1 wt% in poly(methyl methacrylate)), indicating the regulation of triplet dynamics by the relative positions of boron moieties. These compounds have been explored for advanced multi-level anti-counterfeiting applications. Interestingly, the dielectric constant of these molecules ranges from 2.5 to 4.6, indicating both high- and low-k values. Incorporation of these regioisomers on the SiO2 dielectric layer as an interfacial layer enhances the field effect mobility values by up to one order, reaching values as high as 0.1 cm2 V-1 s-1 (p-type) and 0.2 cm2 V-1 s-1 (n-type). This study opens a new platform for developing metal- and lone-pair-free, tunable RTP materials with attractive dielectric properties.
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BibTeX
@article{arumugam2026regioisomerdependent,
title = {{Regioisomer-dependent room-temperature phosphorescence and low-k dielectric properties of naphthalene-bridged organoboranes.}},
author = {Ramar Arumugam and Akkarakkaran Thayyil Muhammed Munthasir and Pagidi Sudhakar and Indrajit Mondal and Loganathan Gayathri and Satyaprasad P Senanayak and Pakkirisamy Thilagar and Vadapalli Chandrasekhar},
journal = {Chemical science},
year = {2026},
month = oct,
doi = {10.1039/d6sc05964c},
url = {https://europepmc.org/article/MED/42953642},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - Regioisomer-dependent room-temperature phosphorescence and low-k dielectric properties of naphthalene-bridged organoboranes.
AU - Ramar Arumugam
AU - Akkarakkaran Thayyil Muhammed Munthasir
AU - Pagidi Sudhakar
AU - Indrajit Mondal
AU - Loganathan Gayathri
AU - Satyaprasad P Senanayak
AU - Pakkirisamy Thilagar
AU - Vadapalli Chandrasekhar
PY - 2026
DA - 2026/10/21
JO - Chemical science
DO - 10.1039/d6sc05964c
UR - https://europepmc.org/article/MED/42953642
AB - Long-lasting room-temperature phosphorescence (RTP) from organic molecules bearing lone-pair-containing heteroatoms has recently emerged. However, designing lone-pair-free molecules with "tunable RTP" remains challenging. Herein, we present "fine-tunable RTP" from boron-containing regioisomers (1-4), that exhibit efficient orange-to-green RTP emission (600 to 515 nm) and ΦPh% (1.8 to 6.7) with delayed lifetimes ranging from 27 to 302 ms in the molecularly dispersed state (1 wt% in poly(methyl methacrylate)), indicating the regulation of triplet dynamics by the relative positions of boron moieties. These compounds have been explored for advanced multi-level anti-counterfeiting applications. Interestingly, the dielectric constant of these molecules ranges from 2.5 to 4.6, indicating both high- and low-k values. Incorporation of these regioisomers on the SiO2 dielectric layer as an interfacial layer enhances the field effect mobility values by up to one order, reaching values as high as 0.1 cm2 V-1 s-1 (p-type) and 0.2 cm2 V-1 s-1 (n-type). This study opens a new platform for developing metal- and lone-pair-free, tunable RTP materials with attractive dielectric properties.
SN - 2041-6520
SN - 2041-6539
ER -