Article
Chemistry, Physical
Vaclav Sebelik, Valentyna Kuznetsova, Heiko Lokstein, Tomas Polivka
Summary: Femtosecond transient absorption spectroscopy was used to investigate the contributions of carotenoids and chlorophylls to the two-photon excitation signals in the plant light-harvesting complex LHCII. Results showed that chlorophylls had a more significant role in the 2PE signals compared to carotenoids in LHCII. Additionally, due to the ratio of carotenoids to chlorophylls in LHCII, only a small fraction of absorbed 2PE photons would excite carotenoids.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Biochemistry & Molecular Biology
Heiko Lokstein, Gernot Renger, Jan P. Goetze
Summary: Chlorophylls, bacteriochlorophylls, and carotenoids are important pigments in photosynthetic organisms, playing a crucial role in light-harvesting and energy transformation. Recent research has made significant progress in understanding the structures and functions of light-harvesting complexes, reaction centers, and photosystems, highlighting the importance of these complexes in adapting to environmental conditions and regulating energy processes. The structural diversity in photosynthetic antenna designs is becoming increasingly apparent, with light-harvesting complexes commonly forming trimeric structures.
Article
Plant Sciences
Yeo Jin Lee, Jae Kwang Kim, Seung-A Baek, Ji-Su Yu, Min Kyoung You, Sun-Hwa Ha
Summary: The OsIspH1 gene plays a crucial role in plastid terpenoid biosynthesis in rice plants, controlling the synthesis of chlorophylls and carotenoids. OsIspH1 is highly expressed in all tissues at different developmental stages, while another gene, OsIspH2, is barely expressed. The complementary relations of two residues are important for enzyme activity.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Food Science & Technology
Raquel Guidetti Vendruscolo, Mariany Costa Depra, Pricila Nass Pinheiro, Valcenir Junior Mendes Furlan, Juliano Smanioto Barin, Alexandre Jose Cichoski, Cristiano Ragagnin de Menezes, Leila Queiroz Zepka, Eduardo Jacob-Lopes, Roger Wagner
Summary: This study evaluated the food potential of Scenedesmus obliquus biomass obtained from photosynthetic cultures enriched with different concentrations of carbon dioxide (CO2). The results showed that higher concentrations of CO2 led to increased synthesis of amino acids and proteins in the cultures. In addition, higher concentrations of chlorophylls were found in cultures with higher CO2 levels, while carotenoid concentrations were higher in cultures with lower CO2 levels. Overall, the Scenedesmus obliquus biomass accumulated significant amounts of proteins, lipids, and pigments through photosynthesis.
FOOD RESEARCH INTERNATIONAL
(2022)
Article
Computer Science, Information Systems
Aleksandra Orzechowska, Joanna Fiedor, Pawel Kulakowski
Summary: Chlorophylls and carotenoids can be used for molecular communications at the nanoscale, with exceptional properties such as energy harvesting and low energy consumption. Spectroscopic experiments confirm the energy transfer efficiency and photochemical efficiency of the photosystem II complex, indicating the potential of photosynthetic systems for nanocommunications.
Article
Plant Sciences
Stefania Toscano, Valeria Cavallaro, Antonio Ferrante, Daniela Romano, Cristina Patane
Summary: The study found that for both species of microgreens, blue LED lights significantly increased fresh weight and chlorophyll a content, while red LED lights had a detrimental effect on polyphenol content.
Article
Engineering, Environmental
Yihang Jiang, Wei Zhu, Zhourui Xu, Zhijun Zhang, Shuo Tang, Miaozhuang Fan, Zhengzheng Li, Jianyu Zhang, Chengbin Yang, Wing-Cheung Law, Ken-Tye Yong, Dong Wang, Gaixia Xu, Ben Zhong Tang
Summary: This study proposes a mitochondrion-targeting two-photon photodynamic therapy (TP-PDT) strategy based on a new type of photosensitizer with aggregation-induced emission (AIE) characteristics. It achieves efficient anti-tumor treatment in hypoxic-tolerant tumors.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Medicine, Research & Experimental
Soham Samanta, Meina Huang, Shaoqiang Li, Zhigang Yang, Ying He, Zhenyu Gu, Jianguo Zhang, Dan Zhang, Liwei Liu, Junle Qu
Summary: This study systematically assessed the structural dependency of an AIE-based system and how the structural modifications can impact the in vivo two-photon imaging. The designed AIE NPs showed higher brightness, improved photostability, and good two-photon absorption cross section, leading to successful in vivo brain vasculature imaging with outstanding penetration depth and spatial resolution.
Article
Agriculture, Multidisciplinary
Slavica Vukovi, Antonij E. Zunic, Ivana Maksimovic, Sanja Lazic, Dragana Sunjka, Vladimira Zunic, Marina Putnik-Delic
Summary: This study assessed the impact of insecticides on chlorophyll and carotenoid contents in peach leaves, with different insecticides showing varying effects on the pigments. Overall, the results demonstrated that the application of certain insecticides decreased total chlorophyll content but increased carotenoid content in peach leaves.
PAKISTAN JOURNAL OF AGRICULTURAL SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Cheng Ouyang, Yongguang Li, Thomas W. Rees, Xinxing Liao, Jianhua Jia, Yu Chen, Xiting Zhang, Liangnian Ji, Hui Chao
Summary: The organoplatinum(II) complex Pt1 can assemble into nanoaggregates via pi-pi stacking and complementary hydrogen bonds, exhibiting ratiometric dual emission in cells with intact membranes and disrupted membranes. The unique characteristics of Pt1 enable its use for tracking cell apoptosis, necrosis, and inflammation in zebrafish.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Wen-Shuo Kuo, Ping-Ching Wu, Chia-Yuan Chang, Jiu-Yao Wang, Pei-Chi Chen, Miao-Hsi Hsieh, Sheng-Han Lin, Jen-Suo Cheng, Yu-Tsung Chou
Summary: By chemically modifying graphene quantum dot materials through nitrogen doping and amino-group functionalization, this study improved electron donation efficiency, enhancing absorption, luminescence, radiative efficiency, and other properties.
Article
Chemistry, Physical
Jan P. Goetze, Florian Anders, Simon Petry, Jan Felix Witte, Heiko Lokstein
Summary: This study presents comprehensive experimental spectroscopic and computational data for relevant plant light harnessing pigments. The investigated pigments show similar photophysics despite differences in excitation energies. The vibrational broadening of carotenoid spectra matches well with experimental data, while Q and Soret band reorganization energies are similar in chlorophylls a and b. Furthermore, this study suggests the existence of an intramolecular charge transfer state in the Soret region of chlorophylls, which has not been experimentally confirmed before.
Article
Engineering, Biomedical
Zhenyan He, Yuting Gao, Huimin Zhang, Ying Xue, Fanling Meng, Liang Luo
Summary: A donor-pi-acceptor photosensitizer with near infrared aggregation-induced emission (AIE) is designed and synthesized for imaging-guided two-photon photodynamic therapy (2P-PDT), demonstrating precise cancer treatment through two-photon excitation in the NIR-II window.
ADVANCED HEALTHCARE MATERIALS
(2021)
Article
Chemistry, Physical
Daniel A. Gacek, Alexander Betke, Julia Nowak, Heiko Lokstein, Peter J. Walla
Summary: Studies have shown varying contributions of carotenoids and chlorophylls to the TPE/TPA spectra of pigment-protein complexes, with some reporting dominant TPE of carotenoids over chlorophyll a while others suggesting minor contributions of carotenoids. Collaboration between research teams is conducted to reconcile these discrepancies and it is concluded that carotenoids play a significant role in shorter wavelengths while chlorophylls dominate above 600/1200 nm in TPE spectra of LHCII and PSI.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Biochemistry & Molecular Biology
Wen-Shuo Kuo, Yen-Sung Lin, Ping-Ching Wu, Chia-Yuan Chang, Jiu-Yao Wang, Pei-Chi Chen, Miao-Hsi Hsieh, Hui-Fang Kao, Sheng-Han Lin, Chan-Chi Chang
Summary: Nitrogen doping and amino group functionalization improve the electron donation of graphene quantum dot-based materials, leading to enhanced two-photon absorption and luminescence. The sorted amino-N-GQDs show potential for applications in two-photon imaging and photodynamic therapy.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Immunology
Sandra T. Persson, Laura Wilk, Matthias Morgelin, Heiko Herwald
INFECTION AND IMMUNITY
(2015)
Article
Chemistry, Physical
Kamarniso Vrandecic, Margus Raetsep, Laura Wilk, Leonid Rusevich, Maksym Golub, Mike Reppert, Klaus-Dieter Irrgang, Werner Kuehlbrandt, Joerg Pieper
JOURNAL OF PHYSICAL CHEMISTRY B
(2015)
Article
Biochemical Research Methods
Laura Wilk, Lotta Happonen, Johan Malmstrom, Heiko Herwald
JOURNAL OF PROTEOME RESEARCH
(2018)
Article
Biochemistry & Molecular Biology
Sergiu Amarie, Laura Wilk, Tiago Barros, Werner Kuehlbrandt, Andreas Dreuw, Josef Wachtveitl
BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS
(2009)
Article
Cell Biology
Laura Wilk, Mike Strauss, Mareike Rudolf, Kerstin Nicolaisen, Enrique Flores, Werner Kuehlbrandt, Enrico Schleiff
CELLULAR MICROBIOLOGY
(2011)
Article
Chemistry, Physical
Pen-Nan Liao, Christoph-Peter Holleboom, Laura Wilk, Werner Kuehlbrandt, Peter J. Walla
JOURNAL OF PHYSICAL CHEMISTRY B
(2010)
Article
Multidisciplinary Sciences
Stefan Bode, Claudia C. Quentmeier, Pen-Nan Liao, Nour Hafi, Tiago Barros, Laura Wilk, Florian Bittner, Peter J. Walla
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2009)
Article
Multidisciplinary Sciences
Laura Wilk, Matthias Grunwald, Pen-Nan Liao, Peter Jomo Walla, Werner Kuehlbrandt
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2013)
Proceedings Paper
Chemistry, Physical
Sergiu Amarie, Laura Wilk, Tiago Barros, Werner Kuehlbrandt, Andreas Dreuw, Josef Wachtveitl
ULTRAFAST PHENOMENA XVI
(2009)
Article
Chemistry, Physical
Jameel Ahmed Bhutto, Zhonglin He, Jawayria Najeeb, Sumaira Naeem, Eman A. Mahmoud, Hosam O. Elansary
Summary: Designing novel drugs using data-driven and virtual screening approaches, such as machine learning and data mining, is a popular research topic in the pharmaceutical industry. In this study, ML models were trained using data collected from academic research articles, and molecular descriptors were utilized. The best ML models were selected and optimized to identify potential compounds for aromatase inhibitors. These models accurately predicted the inhibition values of compounds in a database, and new compounds were designed based on the predictions. Overall, this study demonstrates the potential significance of data-driven and virtual screening approaches in pharmaceutical research.
Article
Chemistry, Physical
Raphael M. Tromer, Isaac M. Felix, Levi C. Felix, Leonardo D. Machado, Cristiano F. Woellner, Douglas S. Galvao
Summary: This study investigates the adsorption mechanisms of hydrogen atoms and molecules on 2D metallic porphyrins using DFT simulations. The results show that hydrogen atoms are chemisorbed while hydrogen molecules are physisorbed. Vanadium and chromium embedded porphyrins exhibit the highest maximum adsorption energies for hydrogen atoms, while scandium embedded porphyrins exhibit the highest maximum adsorption energy for hydrogen molecules. Furthermore, charge transfer is minimal for physisorption and significant for chemisorption. Uniaxial strain has minimal effects on the adsorption properties of 2D metallic porphyrins.
Article
Chemistry, Physical
Ankur Kanti Guha
Summary: This study examines the genuineness of a proposed quadruple bond in AeF(-) (Ae = Be-Ba) using electron localization function (ELF). The ELF analysis reveals the presence of a disynaptic Ae-F basin with electron integration much lower than expected for a quadruple bond. These bonds are classified as Charge-Shift bonds due to the excess kinetic energy in the bonding basins.
Article
Chemistry, Physical
X. F. Yang, Y. J. Dong, H. L. Yu, X. X. Tao, Y. S. Liu
Summary: This study investigates the spin-polarized transport properties of an iron-complex molecule sandwiched between two ferromagnetic zigzag-edged graphene nanoribbon electrodes. The results show the presence of single-spin switching effect, perfect spin filtering effect, and negative differential electrical and thermoelectric resistance in the molecular device. These findings suggest the potential applications of iron-complex molecular devices in the next-generation spin electric and thermoelectric devices.
Article
Chemistry, Physical
Zhengwei Yan, Tianchu Zhao, Qinghua Ren
Summary: In this study, the chemically accurate hybrid MP2:(PBE + D2) + Delta CCSD(T) method was used to investigate the transition states of alkenes reacting with the Al(2)O(7) Bronsted acid site in H-ferrierite (H-FER). The results showed that the MP2 + Delta CC intrinsic energy barriers were higher than the corresponding PBE + D2 intrinsic energy barriers, and the relative energies of the transition states decreased with the increase of the carbon number. For the reactant of propene, the conversion into 2-propoxide had a lower energy barrier compared to the conversion into 1-propoxide.
Article
Chemistry, Physical
Yutong Yao, Qihang Liang, Fawei Zheng, Menglei Li
Summary: In this study, first-principle calculations were used to investigate the structural, electronic, and superconducting properties of hydrogen-rich plutonium polyhydrides under high pressures. The results showed that these systems exhibited metallic behavior, with a low superconducting transition temperature. Additionally, it was found that the f electrons in plutonium had a detrimental effect on the superconductivity in these polyhydrides.
Article
Chemistry, Physical
Ryan Lambert, Arthur C. Reber, Turbasu Sengupta, Shiv N. Khanna
Summary: This study demonstrates how the placement of terminal ligands and the deposition of alkali atoms control the band gap energy and placement of band edges in phosphorene nanoribbons. The work function is significantly affected by the induced dipole of the terminal groups, and the band gap can be manipulated by adding alkali atoms on the surface.
Article
Chemistry, Physical
Daiya Nagai, Akimasa Fujihara
Summary: The effects of intermolecular interactions on the reactivity of hydrogen-bonded clusters of adenosine and tryptophan in the gas phase were investigated using water adsorption and ultraviolet photoexcitation. The results showed that water adsorption weakened the intermolecular interactions between adenosine and tryptophan in the clusters and inhibited the photoinduced glycosidic bond cleavage of adenosine.
Article
Chemistry, Physical
Xiaoping Han, Maamar Benkraouda, Zhiyuan Wang, Zongsheng Zhang, Noureddine Amrane
Summary: This study investigates the effects of Fe substitution and its complex with Sb vacancy on the magnetic properties and optoelectronic functionalities of antimonene. It is found that Fe substitution induces magnetism and promotes optical absorption, while further incorporation of VSb stabilizes Fe dopant and enhances both magnetism and photoabsorption. This work has implications in developing spintronic and optoelectronic applications.
Article
Chemistry, Physical
Yifei Zhang, Xi Wang, Na Liu, Faming Lu
Summary: Understanding the ultrafast electron transfer (ET) processes involving various vibronic excitation in biological systems is challenging. This study investigated the excitation dependence of the photo-induced ET dynamics by selecting mutants in flavodoxin with different ET lifetimes. The results showed that increasing excitation energies resulted in higher vibrational excitation in products for the ultrafast ET processes, but no dependence was found for slower ET due to complete vibrational relaxation.
Article
Chemistry, Physical
Xiang Ge, Jigang Zhao, Xiangqian Yuan, Haitao Shen, Shiyong Wu
Summary: This study investigated the catalytic splitting of 1,1,2-TCE and found that CsCl showed the best catalytic effect. Characterization results of CO2-TPD and NH3-TPD suggested that alkaline sites were beneficial for the selective generation of VDC.
Article
Chemistry, Physical
Theerapol Thurakitseree, Arunothai Rattanachata, Hideki Nakajima, Somruthai Phothiphiphit, Surasak Kuimalee, Pimpun Suknet
Summary: Thin film nitrogen-doped SWCNTs were synthesized using floating-catalyst chemical vapor deposition. The incorporation of low levels of nitrogen into the carbon network resulted in predominance of substitutional and pyridinic nitrogens, changing the electronic structure of the SWCNT film to n-type doping. X-ray absorption spectroscopy revealed the localized structures of carbon and nitrogen bonding environments. The formation of a p-n junction was observed from the I-V characteristic of the N-doped SWCNT heterojunction diode, indicating n-type behavior.
Article
Chemistry, Physical
Chaithanya Kondur, Kelly A. Stephani
Summary: This study investigates the complex dynamics involved in the recombination of atomic nitrogen to form molecular nitrogen and explores the impact of a third body on the recombination dynamics. The results show that the recombination probability is highest for collisions with low translational energies and low time lags. Additionally, a novel rate coefficient expression is developed to evaluate low temperature recombination rate coefficients at a lower computational cost.
Article
Chemistry, Physical
Bingyao Wang, Zhongneng Zhou, Qin Zhang, Bo Dong, Xiu-Wen Kang, Bei Ding
Summary: In this study, two well-separated excited-state vibrational bands were observed in ethanol for indole derivatives with CN substituted on the six-membered rings (4-7CNIs) using UV/Vis pumped IR detection. A population redistribution process between the L-1(a) and L-1(b) states was observed in 4-7CNIs with a time constant of about 20 ps, driven by excitation-induced solvation relaxation. Only a single peak corresponding to the L-1(b) state was detected in 3CNI where the CN is attached on the five-membered ring.
Article
Chemistry, Physical
Ruoqi Zhang, Delu Gao, Yixuan Li, Dunyou Wang
Summary: The adsorption of CO on transition metal clusters supported by divacancy graphene has been studied, revealing that the supported clusters exhibit stronger adsorption capacity for CO due to the orbital coupling and induced electrostatic interaction.
