Multifunctional iron-cobalt heterostructure (FeCoHS) electrocatalysts: accelerating sustainable hydrogen generation through efficient water electrolysis and urea oxidation.

The urgent need to address escalating environmental pollution and energy management challenges has underscored the importance of developing efficient, cost-effective, and multifunctional electrocatalysts. To address these issues, we developed an eco-friendly, cost-effective, and multifunctional electrocatalyst a solvothermal synthesis approach. Due to the merits of the ideal synthesis procedure, the FeCoHS@NF electrocatalyst exhibited multifunctional activities, like OER, HER, OWS, UOR, OUS, and overall alkaline seawater splitting, with required potentials of 1.

Amorphous Cobalt-Impregnated Nitrogen-Doped Carbon Encapsulation Nanochain Enhances Long-Lasting Electrochemical Water Splitting.

Electrochemical water splitting (EWS) is a promising way to attain H, which has been deemed an ideal substitution for fossil fuels because of renewable and eco-friendly benefits. Developing an amorphous-based simple and structurally flexible non-noble catalyst to offer high performance for commercial applications has become a current interest. Amorphous cobalt-anchored nitrogen-doped carbon nanoparticles (Co@NC-NPs) were designed to have a low overpotential and Tafel as a bifunctional electrocatalyst (HER - 142 mV/80 mV dec and OER - 250 mV/72 mV dec) to achieve 10 mA cm in 1.

Robust luminogens as cutting-edge tools for efficient light emission in recent decades.

Blue luminogens play a vital role in white lighting and potential metal-free fluorescent materials and their high-lying excited states contribute to harvesting triplet excitons in devices. However, in TADF-OLEDs (Δ < 0.1 eV), although T excitons transfer to S RISC with 100% IQE, the longer lifetime of blue TADF suffers from efficiency roll-off (RO).

Blue organic light-emitting diodes with hybridized local and charge-transfer excited state realizing high external quantum efficiency.

Donor-spacer-acceptor (D-π-A) materials CAPI and CCAPI, with hybridized local and charge transfer (HLCT) emissive states, have been synthesized. The twisting D-π-A architecture promotes the partial separation of HOMO and LUMO, leading to an enhanced % CT component, and the anthracene moiety in CAPI and CCAPI increases the conjugation length, leading to an enhanced % LE component. The non-doped device with CCAPI shows the blue emission (450 nm) with maximum current efficiency ( ), power efficiency ( ), and external quantum efficiency ( ) of 16.

Efficient blue electroluminescence with an external quantum efficiency of 9.20% and CIE < 0.08 without excimer emission.

Aromatically substituted phenanthroimidazoles at the C6 and C9 positions enhanced the thermal, photochemical and electroluminescence properties due to extension of conjugation. These new materials exhibit good photophysical properties with high thermal stability, good film-forming property and high luminous efficiency. The electroluminescence performances of C6 and C9 modified phenanthroimidazoles as host emitters were evaluated as well as the dopant in the fabricated devices.

Efficient and chromaticity stable green and white organic light-emitting devices with organic-inorganic hybrid materials.

Efficient inverted bottom emissive organic light emitting diodes (IBOLEDs) with tin dioxide and/or Cd-doped SnO nanoparticles as an electron injection layer at the indium tin oxide cathode:electron transport layer interface have been fabricated. The SnO NPs promote electron injection efficiently because their conduction band (-3.6 eV) lies between the work function ( ) of ITO (4.

A novel hot exciton blue fluorophores and white organic light-emitting diodes with simplified configuration.

The two efficient non-doped blue emitters with hybridized local and charge transfer state namely, NDBNPIN and DBTPIN have been synthesised and characterised. These materials are employed as a host for green and red phosphorescent OLEDs. The white device based on DBTPIN:Ir(MDQ)(acac) (4%) exhibit maximum external quantum efficiency (η) -24.

Efficient fluorescent OLEDS based on assistant acceptor modulated HLCT emissive state for enhancing singlet exciton utilization.

Phenylamine phenanthroimidazole based bipolar compounds with donor-acceptor (D-A) architecture namely, 4-(1-(2,3-dihydrobenzo[][1,4]dioxin-5-yl)-6,9-di(pyren-4-yl)-1-phenanthro[9,10-]imidazol-2-yl)-,-diphenylaniline (DDPPPA) and 4'-(1-(2,3-dihydrobenzo[][1,4]dioxin-5-yl)-6,9-di(pyren-4-yl)-1-phenanthro[9,10-]imidazol-2-yl)-,-diphenyl-[1,1'-biphenyl]-4-amine (DDPBA) have been synthesized with highly fluorescent pyrene moieties at C6- and C9-positions. The C6 and C9 modification enhanced the thermal, photochemical and electroluminescent properties. Both molecules were employed as blue emitters in non doped organic light emitting devices (OLEDs) and show high performances due to hybridized local and charge-transfer properties.

Efficient donor-acceptor emitter based nonsymmetrical connection for organic emitting diodes with improving exciton utilization.

A new strategy developed to construct blue emissive materials having an unsymmetrical connection with identical conjugated phenanthrimidazole groups results in the separation of the frontier orbitals and leads to donor-acceptor (D-A) architecture. The blue device with 2-(naphthalen-1-yl)-1-(4-(1-(naphthalen-1-yl)-1-phenanthro[9,10-]imidazol-2-yl)phenyl)-1-phenanthro[9,10-]imidazole (-PPI)/2-(naphthalen-1-yl)-1-(3-(1-(naphthalen-1-yl)-1-phenanthro[9,10-]imidazol-2-yl)phenyl)-1-phenanthro[9,10-]imidazole (-PPI) emissive layer ( - 434/420 nm) shows high efficiencies: current efficiency ( ) - 5.83/3.

Asymmetrically twisted phenanthrimidazole derivatives as host materials for blue fluorescent, green and red phosphorescent OLEDs.

The electroluminescent properties of asymmetrically twisted phenanthrimidazole derivatives comprised of fluorescent anthracene or pyrene unit namely, 1-(1-(anthracen-10-yl)naphthalen-4-yl)-2-styryl-1H-phenanthro[9,10-d]imidazole (ANSPI), 1-(1-(pyren-1-yl) naphthalene-4-yl)-2-styryl-1H-phenanthro[9,10-d]imidazole (PNSPI), 4-(2-(4-(anthracen-9-yl) styryl)-1H-phenanthro[9,10-d]imidazol-1-yl)naphthalene-1-carbonitrile (ASPINC) and 4-(2-(4-(pyren-1-yl)styryl)-1H-phenanthro[9,10-d]imidazol-1-yl)naphthalene-1-carbonitrile (PSPINC) for blue OLEDs have been analyzed. The asymmetrically twisted conformation interrupt π-conjugation effectively results in deep-blue emission. The pyrene containing PSPINC based non-doped blue device (476 nm) shows maximium efficiencies (current efficiency (η)-4.

Strategic tuning of excited-state properties of electroluminescent materials with enhanced hot exciton mixing.

Deep blue emitters with excellent stability, high quantum yield and multifunctionality are the major issues for full-color displays. In line with this, new multifunctional, thermally stable blue emitters , -(4-(10-(1-(2,3-dihydrobenzo[][1,4]dioxin-6-yl)-1-phenanthro[9,10-]imidazol-2-yl)anthracen-9-yl)phenyl)--phenylbenzenamine (DPIAPPB) and 2-(10-(9-carbazol-9-yl)anthracen-9-yl)-1-(2,3-dihydrobenzo[][1,4]dioxin-6-yl)-1-phenanthro[9,10-]imidazole (CADPPI) with hybridized local charge transfer state (HLCT) and hot exciton properties have been synthesized. These molecules show high photoluminescence quantum yield ( ): (DPIAPPB - 0.

Regulation of Singlet and Triplet Excitons in a Single Emission Layer: Efficient Fluorescent/Phosphorescent Hybrid White Organic Light-Emitting Diodes.

Two efficient fluorescent molecules, viz., ()-2-(2-4-(1-2,3-dihydrobenzo[][1,4]dioxin-5-yl)-4,5-diphenyl--imidazole-2-yl)-[1,1-biphenyl]-4-yl)vinyl-1-yl(naphthalene-1-yl)-1-phenanthro[9,10-]imidazole (DDIBNPPI) and ()-4-(2-(2-(-4'-1(2,3-dihyderobenzo[][1,4]dioxin-5-yl)-4,5-diphenyl-1-imidazole-2-yl)-[1,1'-biphenyl]-4-yl)vinyl)-1-phenanthr[9,10-d]imidazole-1-yl)-1-napthronitrile (DDIBPPIN), were designed and synthesized. DDIBNPPI and DDIBPPIN were obtained by rupturing the covalent bond of phenanthrimidazole core to prevent aggregation-induced quenching.

Derivatives of Cyanonaphthyl-Substituted Phenanthroimidazole as Blue Emitters for Nondoped Organic Light-Emitting Diodes.

New multifunctional blue-emissive materials with superior thermal properties, viz., 4,4'-bis(1-(4-naphthyl)-1-phenanthro[9,10-]imidazol-2-yl)binaphthyl (NPIBN), 4,4'-bis(1-(4-cyanonaphthyl)-1-phenanthro[9,10-]imidazol-2-yl)biphenyl (CNPIBP), and 4,4'-bis(1-(4-cyanonaphthyl)-1-phenanthro[9,10-]imidazol-2-yl)binaphthyl (CNPIBN) have been synthesized. The said molecules show high photoluminescence quantum yield (Φ: NPIBN-0.

Promotional effect of silver nanoparticle embedded Ga-Zr-codoped TiO as an alternative anode for efficient blue, green and red PHOLEDs.

Efficient blue, green and red phosphorescent OLEDs have been harvested from silver nanoparticles embedded at a glass:Ga-Zr-codoped TiO interface. The embedded silver nanoparticles at the interface removed the non productive hole current and enhanced the efficiencies. The blue emitting device (456 nm) with emissive layer Ir(fni) exhibits a maximum luminance () of 40 512 cd m (ITO - 37 623 cd m), current efficiency ( ) of 41.

Efficient electroluminescent hybridized local and charge-transfer host materials with small singlet-triplet splitting to enhance exciton utilization efficiency: excited state transition configuration.

A series of efficient electroluminescent materials with dual carrier transport properties shows enhanced singlet exciton utilization ( ) due to small singlet-triplet splitting (Δ ). The strong orbital-coupling transitions of -(4-(1-(1-(2,3-dihydrobenzo[][1,4]dioxin-6-yl)-4,5-diphenyl-1-imidazol-2-yl)naphthalen-4-yl)phenyl)--phenyl benzenamine (DDPB) exhibit deep blue emission at 435 nm (CIEy, 0.07) with an external quantum efficiency of 2.

Efficient full-colour organic light-emitting diodes based on donor-acceptor electroluminescent materials with a reduced singlet-triplet splitting energy gap.

A series of efficient blue-emitting materials, namely, Cz-DPVI, Cz-DMPVI, Cz-DEPVI and TPA-DEPVI, possessing a donor-acceptor architecture with dual carrier transport properties and small singlet-triplet splitting is reported. These compounds exhibit excellent thermal properties with a very high glass-transition temperature ( ), and thus, a stable uniform thin film was formed during device fabrication. Among the weak donor compounds, specifically, Cz-DPVI, Cz-DMPVI and Cz-DEPVI, the Cz-DEPVI-based device showed the maximum efficiencies (: 13 955 cd m, : 4.

Hot exciton transition for organic light-emitting diodes: tailoring excited-state properties and electroluminescence performances of donor-spacer-acceptor molecules.

The photophysical, electrochemical and electroluminescent properties of newly synthesized blue emitters with donor-π-acceptor geometry, namely, 4'-(1-(naphthalen-1-yl)-1-phenanthro[9,10-]imidazol-2-yl)-,-diphenyl-(2-[1,1'-biphenyl]vinyl)-4-amine (NSPI-TPA), 4'-(1-(2-methylnaphthalen-1-yl)-1-phenanthro[9,10-]imidazol-2-yl)-,-diphenyl-(2-[1,1'-biphenyl]vinyl)-4-amine (MNSPI-TPA), 4-(2-(4'-(diphenylamino)-(2-[1,1'-biphenyl]vinyl)-4-yl)-1-phenanthro[9,10-]imidazol-1-yl)-1-naphthalene-1-carbonitrile (SPNCN-TPA) and 4-(2-(4-(9-carbazol-9-yl)styryl)-1-phenanthro[9,10-]imidazol-1-yl)naphthalene-1-carbonitrile (SPNCN-Cz) were analyzed. The conjugation length in the emitters is not conducive to pure emission and hence, a molecular twisting strategy was adopted in NSPI-TPA, MNSPI-TPA, SPNCN-TPA and SPNCN-Cz to enhance pure emission. The emissive state (HLCT) of twisted D-π-A molecules containing both LE and CT (HLCT) states was tuned for high PL ( ) (LE) and high exciton utilization ( ) (CT) efficiencies by replacing triphenylamine (strong donor) with carbazole (weak donor).

Tailoring the molecular design of twisted dihydrobenzodioxin phenanthroimidazole derivatives for non-doped blue organic light-emitting devices.

Three fused polycyclic aryl fragments, namely, naphthyl, methoxynaphthyl, and pyrenyl have been used to construct blue-emissive phenanthroimidazole-functionalized target molecules, , 1-(2,3-dihydrobenzo[][1,4]dioxin-6-yl)-2-(naphthalen-1-yl)-1-phenanthro[9,10-]imidazole (1), 1-(2,3-dihydrobenzo[][1,4]dioxin-6-yl)-2-(1-methoxynaphthalen-4-yl)-1-phenanthro[9,10-]imidazole (2), and 1-(2,3-dihydrobenzo[][1,4]dioxin-6-yl)-2-(pyren-10-yl)-1-phenanthro[9,10-]imidazole (3). The up-conversion of triplets to singlets a triplet-triplet annihilation (TTA) process is dominant in these compounds due to 2 > . The pyrenyl dihydrobenzodioxin phenanthroimidazole (3)-based nondoped OLED exhibits blue emission (450 nm) with CIE (0.

Efficient donor-acceptor host materials for green organic light-emitting devices: non-doped blue-emissive materials with dual charge transport properties.

Comparative optical, electroluminescence and theoretical studies were performed for ()-4'-(1-(4-(2-(1-(4-morpholinophenyl)-1-phenanthro[9,10-]imidazol-2-yl)vinyl)phenyl)-1-phenanthro[9,10-]imidazol-2-yl)-,-diphenyl-[1,1'-biphenyl]-4-amine (SMPI-TPA) and ()-4-(4-(2-(4-(2-(4-(9-carbazol-9-yl)phenyl)-1-phenanthro[9,10-]imidazol-1-yl)styryl)-1-phenanthro[9,10-]imidazol-1-yl)phenyl)morpholine (SMPI-Cz). These compounds show excellent thermal properties, dual charge transport properties and form thin films under thermal evaporation. Blue OLEDs (CIE: 0.

A hybrid inorganic-organic light-emitting diode using Ti-doped ZrO as an electron-injection layer.

We have fabricated stable efficient iridium(iii)-bis-5-(1-(naphthalene-1-yl)-1-phenanthro[9,10-]imidazole-2-yl) benzene-1,2,3-triol (acetylacetonate) [Ir(NPIBT) (acac)] doped inverted bottom-emissive green organic light-emitting diodes using Ti-doped ZrO nanomaterials as the electron injection layer. The current density () and luminance () of the fabricated devices with Ti-doped ZrO deposited between an indium tin oxide cathode and an Ir(NPIBT) (acac) emissive layer increased significantly at a low driving voltage (V) compared with control devices without Ti-doped ZrO. The Ti-doped ZrO layer can facilitate the electron injection effectively and enhances the current efficiency ( ) of 2.

Fused Methoxynaphthyl Phenanthrimidazole Semiconductors as Functional Layer in High Efficient OLEDs.

Efficient hole transport materials based on novel fused methoxynaphthyl phenanthrimidazole core structure were synthesised and characterized. Their device performances in phosphorescent organic light emitting diodes were investigated. The high thermal stability in combination with the reversible oxidation process made promising candidates as hole-transporting materials for organic light-emitting devices.

Site Specific Interaction Between TiO2 Nanoparticles and Phenanthrimidazole-A First Principles Quantum Mechanical Study.

Understanding the interaction between the nanomaterials and bioactive molecules are of current interest due to the potential application of nanomaterial in biomedical field. The structural, electronic and optical properties of newly synthesised fluorophore 2-(4-methoxynaphthalen-1-yl)-1-phenyl-1H-phenanthro[9.10-d]imidazole have been investigated in detail.

Synthesis, spectral and antimicrobial evaluation of some novel 1-methyl-3-alkyl-2,6-diphenylpiperidin-4-one oxime carbonates.

Synthesis of some novel biologically active piperidin-4-one oxime carbonates from 1-methyl-3alkyl-2,6-diphenylpiperidin-4-one oximes and substituted chloroformates was carried out in the presence of potassium carbonate as base and tetrabutylammonium bromide (TBAB) as catalyst. The newly synthesized compounds were characterized by IR, (1)H, (13)C NMR and LC-mass spectra. Based on the (1)H NMR analysis, all the compounds were found to adopt normal chair conformation with equatorial orientation of all the substituents.

Physico-chemical studies of fused phenanthrimidazole derivative as sensitive NLO material.

Heterocyclic phenanthrimidazole derivative, 2-(4-fluorophenyl)-1-p-tolyl-1H-imidazo[4,5-f] [1,10] phenanthroline (FPTIP) has been synthesized and characterised by NMR, mass and CHN analysis. The FPTIP was evaluated concerning their solvatochromic properties and molecular optical nonlinearities. Their electric dipole moment (μ), polarizability (α) and hyperpolarizability (β) have been calculated theoretically and the results indicate that the extension of the π-framework of the ligands has an effect on the NLO properties.