Azolate‐Based Osmium(II) Complexes with Luminescence Spanning Visible and Near Infrared Region

European Journal of Inorganic Chemistry, Journal Year: 2022, Volume and Issue: 2022(20)

Published: May 5, 2022

Abstract Mononuclear osmium(II) complexes bearing azolate chromophoric chelates constituted a new class of emitters that are isoelectronic to the iridium(III) complexes, i. e., all with low‐spin d 6 electronic configuration. The high reactivity azole toward osmium reagent Os 3 (CO) 12 via N−H oxidative addition gives eventual formation various mononuclear showing bright emission ranging from sky‐blue near infrared. Tuning luminescence was executed by variation nature and π‐conjugation chelates, as well changing metal‐based electron density further ligand substitution. One important result is successful isolation two classes NIR emissive complexes; those ligand‐to‐ligand charge transfer process at excited state seems be less efficient than facilitated distinctive intra‐ligand process. In addition, fabrication characterization OLED devices were elaborated, confirming their potential serve saturated‐red phosphors.

Language: Английский

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Decomposable Flexible Organic Transistors with a Cellulose-Based Gate Dielectric and Substrate for Biodegradable Electronics

ACS Applied Materials & Interfaces, Journal Year: 2023, Volume and Issue: 15(29), P. 35261 - 35271

Published: July 13, 2023

In this work, decomposable and combustible flexible organic transistors with a cellulose-based dielectric substrate were demonstrated in an effort to produce biodegradable systems for eco-sustainable electronics. High-k cyanoethyl cellulose (CEC) was explored as suitable gate candidate enhancing the biodegradability of devices fabricated on paper substrate. The exhibited high performance -5 V operation excellent saturation output characteristics along remarkable environmental, operational, electromechanical, thermal stability. Upon annealing, did not degrade till temperature 60 °C, indicating their suitability practical operating environments. Moreover, decent stability upon exposure very humidity. Most importantly, these decomposed water-rich soil 19 days due microorganisms present soil, confirming biodegradability, which is highly essential combustion fire, one quickest methods degradation, led significant reduction mass more than 75%, leaving ashes primarily consisting remains Ag bottom-gate Au source/drain electrodes. Our results demonstration full decomposability combustibility can be step toward preparation fully electronics minimize effects e-waste environment soil.

Language: Английский

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Subdural CMOS optical probe (SCOPe) for bidirectional neural interfacing

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: Feb. 8, 2023

Optical neurotechnologies use light to interface with neurons and can monitor manipulate neural activity high spatial-temporal precision over large cortical extents. While there has been significant progress in miniaturizing microscope for head-mounted configurations, these existing devices are still very bulky could never be fully implanted. Any viable translation of technologies human will require a much more noninvasive, implantable form factor. Here, we leverage advances microelectronics heterogeneous optoelectronic packaging develop transformative, ultrathin, miniaturized device bidirectional optical stimulation recording: the subdural CMOS Probe (SCOPe). By being thin enough lie entirely within space primate brain, SCOPe defines path eventual new generation brain-machine interfaces based on light.

Language: Английский

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Blue Transparent OLEDs with High Stability and Transmittance for Modulating Sleep Disorders

Advanced Materials Interfaces, Journal Year: 2023, Volume and Issue: 10(11)

Published: March 9, 2023

Abstract Optoelectronics devices utilizing organic light‐emitting diodes (OLEDs) are emerging as new platforms for healthcare applications. In particular, wearable optoelectronics such visual stimulus systems offer a distinctive advantage to intervene in and improve sleep disorders. this study, two improvements proposed transparent OLEDs (TrOLEDs) that will be critical First, zinc sulfide with high surface energy refractive index is explored seed capping layer. An ultra‐thin silver cathode of 8 nm demonstrated feasible TrOLEDs, luminous transmittance 91% achieved. Second, general, achieving the operational stability TrOLEDs challenging due vulnerability thin electrodes. By introducing doping process electron transport layer, lifetime comparable control thick cathodes (>90%) secured. Last, preclinical model using blue light modulate patterns. Melanopsin stimulated at highest level desire, reducing non‐rapid eye movement duration mice by up 14%. Based on these results, promising candidates modulating disorders insomnia narcolepsy–cataplexy convenience form factors.

Language: Английский

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Theoretical investigations of the auxochromic effect on novel thermally activated delayed fluorescence (TADF) anthracene derivatives

BMC Chemistry, Journal Year: 2025, Volume and Issue: 19(1)

Published: Feb. 17, 2025

Thermally active delayed fluorescence (TADF) of experimentally synthesized anthracene derivatives is studied. The studied compounds are named as 9-cyano-10-diphenylamino-anthracene (Cy-Anth-1), 9-(N-carbazolyl)-10-cyanoanthracene (Cy-Anth-2), 10-(benzofuro[2,3-b] pyridin-6-yl)-N, N-diphenylanthracen-9-amine (Benzo4-Anth-1), 6-(10-(9H-carbazol-9-yl) anthracen-9-yl) benzofuro[2,3-b] pyridine (Benzo4-Anth-2). Chemical characterization and the structure-TADF relationship were determined using DFT TD-DFT techniques. analysis frontier molecular orbitals electrostatic potential indicated that Benzo4-Anth-1 derivative a good candidate for TADF due to its spatially separated donor acceptor groups. energy gap ΔE (S1-T2) Cy-Anth-1, Cy-Anth-2, Benzo4-Anth-1, Benzo4-Anth-2 0.0057, -0.026, 0.0528, -0.0635 eV, respectively. While (T2-T1) 0.759, 0.790, 1.019, 0.926 Donor (D = (N, N-diphenyl)) (A (10-(benzofuro[2,3-b] pyridin-6-yl)) in D-π-A system enhances (S1-S0) up 2.837 eV decreases by making it material. Thermodynamic investigation revealed rise temperature from 50–500 K, CV, CP, internal (U), enthalpy (H), entropy (S), ln (Q) increases, but Gibbs free (G) decreases.

Language: Английский

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