Nano Research, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
Language: Английский
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(25)
Published: March 8, 2023
Ultraviolet (UV, λ<400 nm) light is essential for various photochemical reactions, but its intensity in the solar spectrum very low, and sources that artificially generate high-energy UV are inefficient environmentally unfriendly. A solution to this problem photon upconversion (UC) from visible (vis, λ>400 light. Among several mechanisms, UC based on triplet-triplet annihilation (TTA-UC) particular has made remarkable progress recent years. The development of new chromophores enabled highly efficient conversion low-intensity into In review, we summarize visible-to-UV TTA-UC, their production films application processes such as catalysis, bond activation polymerization. Finally, challenges opportunities future material applications will be discussed.
Language: Английский
Citations
51
Nature Reviews Physics, Journal Year: 2023, Volume and Issue: 6(2), P. 99 - 113
Published: Dec. 12, 2023
Language: Английский
Citations
44
Molecules, Journal Year: 2024, Volume and Issue: 29(11), P. 2534 - 2534
Published: May 28, 2024
The symbiotic relationship between nitrogen-fixing cyanobacteria and plants offers a promising avenue for sustainable agricultural practices environmental remediation. This review paper explores the molecular interactions nanoparticles, shedding light on their potential synergies in nanotechnology. Delving into evolutionary history specialized adaptations of cyanobacteria, this highlights pivotal role fixing atmospheric nitrogen, which is crucial ecosystem productivity. discusses unique characteristics metal nanoparticles emerging applications agriculture, including improved nutrient delivery, stress tolerance, disease resistance. It delves complex mechanisms nanoparticle entry plant cells, intracellular transport, localization, uncovering impact root-shoot translocation systemic distribution. Furthermore, elucidates cellular responses to exposure, emphasizing oxidative stress, signaling pathways, enhanced uptake. as carriers essential nutrients implications nutrient-use efficiency crop yield are also explored. Insights modulation responses, resistance, phytoremediation strategies demonstrate multifaceted benefits agriculture. Current trends, prospects, challenges nanotechnology discussed, underscoring need responsible safe utilization. By harnessing power leveraging attributes paves way innovative, sustainable, efficient practices.
Language: Английский
Citations
26
Nature Reviews Chemistry, Journal Year: 2024, Volume and Issue: 8(4), P. 238 - 255
Published: March 21, 2024
Language: Английский
Citations
25
ACS Central Science, Journal Year: 2024, Volume and Issue: 10(2), P. 272 - 282
Published: Jan. 16, 2024
The rapid photochemical conversion of materials from liquid to solid (i.e., curing) has enabled the fabrication modern plastics used in microelectronics, dentistry, and medicine. However, industrialized photocurables remain restricted unimolecular bond homolysis reactions (Type I photoinitiations) that are driven by high-energy UV light. This narrow mechanistic scope both challenges production high-resolution objects restricts can be produced using emergent manufacturing technologies (e.g., 3D printing). Herein we develop a photosystem based on triplet-triplet annihilation upconversion (TTA-UC) efficiently drives Type photocuring process green light at low power density (<10 mW/cm2) presence ambient oxygen. system also exhibits superlinear dependence its cure depth exposure intensity, which enhances spatial resolution. enables for first-time integration TTA-UC an inexpensive, rapid, process, digital processing (DLP) printing. Moreover, relative traditional II (photoredox) strategies, present photoinitiation method results improved confinement resin shelf stability. report provides user-friendly avenue utilize processes paves way toward next-generation with geometric precision functionality.
Language: Английский
Citations
8
Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Journal Year: 2025, Volume and Issue: 330, P. 125717 - 125717
Published: Jan. 13, 2025
Language: Английский
Citations
1
Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: 147(9), P. 7187 - 7190
Published: Feb. 20, 2025
Triplet–triplet annihilation (TTA) enables photon upconversion by combining two lower-energy triplet excitons to produce a higher-energy singlet exciton. This mechanism enhances light-harvesting efficiency for solar energy conversion and the use of photons in bioimaging photoredox catalysis applications. The magnetic modulation such high-energy presents an exciting opportunity develop molecular quantum information technologies. While spin dynamics exciton pairs are sensitive external fields, field effects (MFEs) associated with these generally limited statistics at most 10% low fields (<1 T), making them challenging apply technological advancements. In contrast, MFEs on spin-correlated radical (SCRPs) can be significantly greater, surpassing those pairs. By using SCRPs-based qubits as sensitizers sensitized TTA scheme, we magnetically modulate consequently, delayed fluorescence annihilators. our current system, have achieved more than 70% fluorescence, effectively harnessing even amplifying within SCRPs influence excitons. work opens new opportunities advancing spin-controlled chemical reactions
Language: Английский
Citations
1
Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(30), P. 16597 - 16609
Published: July 21, 2023
Photoactive complexes with earth-abundant metals have attracted increasing interest in the recent years fueled by promise of sustainable photochemistry. However, sophisticated ligands complicated syntheses are oftentimes required to enable photoactivity nonprecious metals. Here, we combine a cheap metal simple easily access photoactive complex. Specifically, synthesize molybdenum(0) carbonyl complex Mo(CO)3(tpe) featuring tripodal ligand 1,1,1-tris(pyrid-2-yl)ethane (tpe) two steps high overall yield. The shows intense deep-red phosphorescence excited state lifetimes several hundred nanoseconds. Time-resolved infrared spectroscopy and laser flash photolysis reveal triplet metal-to-ligand charge-transfer (3MLCT) as lowest state. Temperature-dependent luminescence complemented density functional theory (DFT) calculations suggest thermal deactivation 3MLCT via higher lying metal-centered states analogy well-known photophysics [Ru(bpy)3]2+. Importantly, found that title compound is very photostable due lack labilized Mo-CO bonds (as caused trans-coordinated CO) facial configuration ligands. Finally, show versatility applications: (1) green-to-blue photon upconversion triplet-triplet annihilation mechanism (2) photoredox catalysis for green-light-driven dehalogenation reaction. Overall, our results establish promising design strategy stable avoiding tedious multistep syntheses.
Language: Английский
Citations
22
Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(20), P. 11402 - 11414
Published: May 15, 2023
Sensitized triplet–triplet annihilation upconversion is a promising strategy to use visible light for chemical reactions requiring the energy input of UV photons. This avoids unsafe ultraviolet sources and can mitigate photo-damage provide access reactions, which filter effects hamper direct excitation. Here, we report new approach make blue-to-UV more amenable photochemical applications. The tethering naphthalene unit cyclometalated iridium(III) complex yields bichromophore with high triplet (2.68 eV) naphthalene-based reservoir featuring lifetime 72.1 μs, roughly factor 20 longer than photoactive excited state parent complex. In combination three different annihilators, consistently lower thresholds crossover from quadratic into linear excitation power dependence regime were observed compared system composed 2,5-diphenyloxazole annihilator sufficiently robust under long-term blue irradiation continuously high-energy singlet-excited that drive normally light. Both photoredox transfer catalyses feasible using this concept, including reductive N–O bond cleavage Weinreb amides, C–C coupling reaction based on aryl debromination, two Paternò–Büchi [2 + 2] cycloaddition reactions. Our work seems relevant in context developing strategies driving energetically demanding photochemistry low-energy
Language: Английский
Citations
20
Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(43)
Published: Sept. 8, 2023
Photosensitizers for sensitized triplet-triplet annihilation upconversion (sTTA-UC) often rely on precious heavy metals, whereas coordination complexes based abundant first-row transition metals are less common. This is mainly because long-lived triplet excited states more difficult to obtain 3d particularly when the d-subshell only partially filled. Here, we report first example of sTTA-UC a 3d6 metal photosensitizer yielding an performance competitive with metal-based analogues. Using newly developed Cr0 featuring equally good photophysical properties as OsII benchmark complex in combination acetylene-decorated anthracene annihilator, red-to-blue achievable. The efficiency under optimized conditions 1.8 %, and excitation power density threshold reach strong limit 5.9 W/cm2 . These factors, along high photostability, permit initiation acrylamide polymerization by red light, radiative energy transfer between delayed annihilator fluorescence blue light absorbing photo-initiator. Our study provides proof-of-concept photon elusive analogues widely employed d6 photosensitizers, their application photochemical reactions triggered wavelengths close near-infrared.
Language: Английский
Citations
19