Article
Chemistry, Multidisciplinary
Himadri Shekar Roy, K. M. Neethu, Swati Rajput, Sreyanko Sadhukhan, Vijayendran Gowri, Arif Hassan Dar, Malika Monga, Navita Salaria, Rajdeep Guha, Naibedya Chattopadhyay, Govindasamy Jayamurugan, Deepa Ghosh
Summary: The excess nitric oxide (NO) produced in response to bacterial/proinflammatory stimuli is responsible for pathological conditions. Current approaches targeting excess NO production have been unsuccessful. Urea-functionalized push-pull chromophores with NO scavenging properties have shown therapeutic efficacy in modulating NO-mediated diseases and have potential for further research.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Physical
Yi Hu, Ajyal Alsaleh, Oanh Trinh, Francis D'Souza, Hong Wang
Summary: In this study, beta-functionalized push-pull zinc opp-dibenzoporphyrins were designed and synthesized as sensitizers for dye-sensitized solar cells. The utilization of arylamine as the donor group effectively solved the solar cell instability. Different arylamine donor groups showed varying electronic effects, with diphenylamine and phenothiazine exhibiting strong push-pull characteristics while carbazole canceled out this effect. Solar cells using YH9 and YH10 achieved high power conversion efficiencies, comparable to that of the best ruthenium dye N719. The potential of pi-extended porphyrins as sensitizers for dye-sensitized solar cells was demonstrated in this work.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Urban Studies
Fangqu Niu
Summary: This study developed an inter-city migration model based on the push-pull theory, consisting of three sub-models and achieving good results in simulating China's inter-city migration. The model is easy to expand and discuss regional applicability and extension.
Article
Chemistry, Physical
Bijesh Sekaran, Manan Guragain, Rajneesh Misra, Francis D'Souza
Summary: In this study, a charge transfer mechanism to produce singlet oxygen involving push or pull functionalized porphyrins was demonstrated. The results showed that porphyrins carrying push groups exhibited improved performance in generating O-1(2).
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Chemistry, Applied
Taejun Eom, Anzar Khan
Summary: This work discusses the synthesis and properties of monoazobenzene compounds with multiple electron-donating and electron-withdrawing substituents, showing that the position of these groups greatly influences the absorption spectrum. Changes in the arrangement of specific groups can lead to significant shifts in absorption maximum. Additionally, a reversible blue-shift phenomenon was observed under acidic conditions.
Article
Polymer Science
Guanglong Li, Jing Huang, Han Sen Soo, Yunxiang Zhao, Ting Li, Yang Wang, Shibo Wang, Weifu Dong
Summary: Poly(beta-hydrazide esters) have been utilized to accelerate the dissociation rates of dynamic aza-Michael adducts and create covalent adaptable networks (CANs) with faster reprocessing rates. The push electronic effect of the aryl carboxamide group increases electron density on the terminal amine of the hydrazide, while the pull electronic effect of the alkyl carboxamide group reduces electron density. This push-pull electronic effect can regulate the reversibility of the dynamic covalent bonds and achieve thermosets that can be reprocessed rapidly.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Physical
Vijayendran Gowri, Sachin Jalwal, Arif Hassan Dar, Arya Gopal, Azhagumuthu Muthukrishnan, Ashima Bajaj, Md. Ehesan Ali
Summary: A new non-planar push-pull chromophore has been found to be an efficient system for detecting F- ion in water, with the sensing mechanism governed by H-bonding and deprotonation. However, replacing the phenyl group with DMA led to the failure of colorimetric and fluorometric detections due to masking and quenching effects. Excellent sensitivity and specificity towards F- was demonstrated in a successful tissue paper-based visual strip detection method.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2021)
Article
Chemistry, Physical
Catalina Sandoval-Altamirano, Eduardo Berrios, Javier Morales, Christian Silva, German Gunther
Summary: Phenalenone and its derivatives have high singlet oxygen generation capacity through photosensitization. Efforts have been made to obtain phenalenones with red-shifted absorption while maintaining the ability to generate singlet oxygen. The presence of a dimethylamino substituent at positions 3 or 6 allows for modulation of singlet oxygen generation capacity and fluorescence. Both compounds show red-shifted absorption compared to phenalenone, with different solvent effects on their absorption and emission properties.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Spectroscopy
Ramil F. Fatykhov, Ainur D. Sharapov, Ekaterina S. Starnovskaya, Yaroslav K. Shtaitz, Maria I. Savchuk, Dmitry S. Kopchuk, Igor L. Nikonov, Grigory V. Zyryanov, Igor A. Khalymbadzha, Oleg N. Chupakhin
Summary: A series of coumarin-pyridine push-pull fluorophores were successfully synthesized through direct C-H functionalization, with 4-alkylcoumarin pyridine derivatives showing good photoluminescence quantum yields, while 4-phenylcoumarin derivatives did not exhibit noticeable fluorescence. Detailed photophysical studies demonstrated the potential of combining different chromophore systems to enhance the properties of new fluorescent compounds.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Engineering, Electrical & Electronic
Yue Yang, Zhengchun Luo, Zhongmin Wang, Yaolu Zhang, Tianying Chang, Miao Yu, Liyao Cheng, Chongjian Wu, Hong-Liang Cui
Summary: The high-performance push-pull fiber optic hydrophone has been successfully developed with improved sensitivity and minimum detectable pressure. Its interferometric design allows for detection of underwater pressure variations at extremely low frequencies.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Materials Science, Multidisciplinary
Nicolas Ledos, Denis Tondelier, Bernard Geffroy, Denis Jacquemin, Pierre-Antoine Bouit, Muriel Hissler
Summary: We synthesized and characterized benzophosphole oxides with an ethoxy substituent on the P atom and electro-donating amino groups on the lateral phenyl groups. The optical and redox properties of these compounds were studied experimentally and computationally. The nature of the donor was shown to fine-tune the internal charge transfer and optical properties. These compounds were used in multilayered organic light emitting devices due to their intense fluorescence, favorable redox and thermal properties. One compound even achieved an external quantum efficiency of 5%, highlighting the potential of this novel family of fluorophores for next generation optoelectronic/photonic devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Business
Joern Hoppmann, Geng Wu, Jillian Johnson
Summary: The way firms search for knowledge has a critical impact on their innovation performance and technological evolution, and public policies can influence these search activities. Technology-push policies increase search distance, demand-pull policies decrease it, and the influence of policies on search scope is moderated by the breadth of firms' existing knowledge base.
TECHNOLOGICAL FORECASTING AND SOCIAL CHANGE
(2021)
Article
Chemistry, Inorganic & Nuclear
Inderpal Yadav, Mohd Shanu, Jitendra Nath Acharyya, G. Vijaya Prakash, Muniappan Sankar
Summary: This article investigates the photophysical, redox, and nonlinear optical properties of nonplanar and unsymmetrically beta-functionalized copper corroles. The results show the significant impact of beta-functionalization and nonplanarity on the corrole ring. These findings may open up new possibilities for nonlinear optical devices, femtosecond optical limiters, and other ultrafast photonic applications.
INORGANIC CHEMISTRY
(2022)
Article
Health Care Sciences & Services
Julie K. Silver, Nara Gavini
Summary: Mentorship plays a vital role in professional development, but is hampered by a shortage of experienced mentors and limited time for mentorship, particularly impacting midcareer women mentors. The Push-Pull Mentoring Model offers a solution by emphasizing shared responsibility and active engagement between mentors and mentees, providing a flexible and collaborative approach to support both individuals' career goals. This model promises an alternative to traditional mentoring and can help institutions overcome limited mentorship resources.
JOURNAL OF MEDICAL INTERNET RESEARCH
(2023)
Article
Chemistry, Applied
Tomas Beranek, Martin Kos, Lubomir Vana, Ivana Cisarova, Jan Sykora, Jan Storch, Vladimir Cirkva, Martin Jakubec
Summary: Six helicene based push-pull systems were designed and synthesized to modify the optical properties of the helicene skeleton. The properties of the compounds were studied by DFT calculations and spectroscopic methods. The introduction of a diphenylaminophenylene group as a donor led to an increase in fluorescence quantum yield and a dependence on solvent polarity.
Article
Chemistry, Multidisciplinary
Yongming Deng, Siddhartha Kumar, Kraig Wheeler, Hong Wang
CHEMISTRY-A EUROPEAN JOURNAL
(2015)
Article
Chemistry, Multidisciplinary
R. G. Waruna Jinadasa, Bihong Li, Benjamin Schmitz, Siddhartha Kumar, Yi Hu, Lei Kerr, Hong Wang
Article
Chemistry, Multidisciplinary
Siddhartha Kumar, Xiaoqin Jiang, Wenqian Shan, R. G. Waruna Jinadasa, Karl M. Kadish, Hong Wang
CHEMICAL COMMUNICATIONS
(2018)
Article
Chemistry, Multidisciplinary
Yongming Deng, Siddhartha Kumar, Hong Wang
CHEMICAL COMMUNICATIONS
(2014)
Article
Chemistry, Multidisciplinary
Siddhartha Kumar, Whitney Webre, Jacob Schaffner, Sheikh M. S. Islam, Francis D'Souza, Hong Wang
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2019)
Article
Chemistry, Multidisciplinary
Michael B. Thomas, Siddhartha Kumar, Timothy Esquivel, Hong Wang, Francis D'Souza
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
(2020)
Article
Chemistry, Organic
Siddhartha Kumar, Whitney A. Webre, Courtney Stewart, Francis D'Souza, Hong Wang
Meeting Abstract
Chemistry, Multidisciplinary
Siddhartha Kumar, Hong Wang
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2014)