Themed collection Luminescence and photophysical properties of metal complexes

Luminescent lanthanide coordination polymers composed of lanthanide ions and organic joint ligands exhibit characteristic photophysical and thermostable properties that are different from typical organic dyes, luminescent metal complexes, and semiconductor nanoparticles.

Adverse influences of mercury on living organisms are well known. Despite efforts from various regulatory agencies, the build-up of Hg²⁺ concentration in the environment is of serious concern. This necessitates the search for new and efficient reagents for recognition and detection of Hg²⁺ in environmental samples.

The influence of different anchoring groups in the efficiency of porphyrin dye sensitized solar cells.

The present situation reveals the dependence on fossil fuels, which is seriously accountable for two major impediments: (i) global warming due to increasing atmospheric carbon dioxide (CO₂) and (ii) the alarming consumption of energy assets. Therefore, the photocatalytic CO₂ conversion technology needs to select efficient photocatalysts towards solar fuel harvesting.

Knowledge of Zn(II) coordination-modulated ligand photophysics is the foundation for developing fluorescent indicators that help address challenges in Zn(II) biology.

In this review article, we describe very recent applications of phosphorescent transition metal complexes in intracellular biosensing, bioimaging, and phototherapeutics.

Time-resolved NIR imaging of lanthanide coated silica particles using Photon Arrival Time Imaging allows fast acquisition of high contrast images based on the probe luminescence lifetime.

We constructed lanthanide ion doped double-crossover DNA lattices grown on a silica substrate and studied their photoluminescence characteristics.

The solvent-free Eu-MOF with high red emission intensity and the microporous instinct exhibits high sensitivity for 2,4,6-trinitrophenol with K_sv constant 6.24 × 10⁴ M⁻¹.

Pd(II)-directed self-assembly of homoleptic metal–polypyridyl complexes functionalized with 3-pyridyl groups gives rise to supramolecular metallo-triangles as confirmed by a combination of analytical techniques.

Unprecedented Negishi reaction in haloBODIPYs to yield alkyl, aryl and alkynyl BODIPY dyes, including interesting a symmetrically disubstituted derivatives, is described.

In the present work, thin films of ruthenium based metal–organic frameworks are synthesized using a layer-by-layer (LbL) technique and the film is characterized using XRD, FE-SEM, UV/visible spectroscopy, cyclic voltammetry and photoluminance spectroscopy.

Hexanuclear molybdenum [Mo₆Br₁₄]²⁻ cluster units induced photocatalytic reduction of CO₂ to methanol under visible light irradiation.

A novel naphthalimide-containing hexagonal metallocycle with the function of fluorescence detection of proton has been constructed via coordination-driven self-assembly.

Novel orthogonally arranged Ir(III) porphyrin-aza-BODIPY conjugates exhibit strong absorbance in the near infrared region and have unusually high singlet oxygen quantum yields, since they act as unique molecules rather than as dyads.

High performance green electroluminescent device with maximum brightness, current efficiency, power efficiency and external quantum efficiency (EQE) up to 113 610 cd m⁻², 112.30 cd A⁻¹, 97.95 lm W⁻¹ and 29.4%, was realized.

Novel blue phosphorescent bis- and tris-cyclometalated iridium(III) complexes with excellent PL quantum yields were developed, using fluorinated 2-(5-benzoylphenyl)pyridinate ligands.

cis-[Ru(cbz₂-phen)(dcbH₂)(NCS)₂] sensitized cells exhibited higher performance than those by N3. The efficiency is discussed in terms of its thermodynamic and structure.

Two bichromophoric platinum metallomesogens, FJ-1 and FJ-2, exhibited fluorescence (¹π,π*) and phosphorescence (³π,π*) dual emissions in solution. Their photophysical properties were detailedly investigated by experiment and theory calculation.

Both the charges and benzothiazolylfluorenyl pendant on the 2-phenylpyridine ligand influence the photophysics and reverse saturable absorption of Ir(III) complexes.

The coordination of Eu(III) (from Eu(III)(hfa)₃) by chiral P(III) (from BINAP) led to circularly polarised luminescence in dilute solutions on the order of |g_em| ≈ 10⁻² at ⁵D₀ → F₁ and |g_em| ≈ 10⁻² at ⁵D₀ → F₂ transitions, i.e., in chloroform and acetone.

New complexes Ir(ppm)₂(pic) and Ir(ppm)₂(taz) emitted 555 and 532 nm light, respectively. Solution-processed organic light-emitting diodes based on Ir(ppm)₂(taz) showed high-brightness of 125072 cd m⁻², peak current efficiencies of 40.4 cd A⁻¹.

A red luminescent film was constructed by self-assembly of 1-Pt from methanol. The film on a substrate, exhibiting multi-stimuli responsiveness, was further obtained.

Fluorescent detection of histidine is achieved with distinctive color change from yellow to blue by using the Zn(II) complexes of the terpyridine–tetraphenylethene conjugates.

A new photochromic MOF compound exhibits a charge-separated state with lifetime exceeding the reported values of the analogues and a luminescence contrast higher than those of most known pyridine derivative-based photochromic compounds.

A red light and concentrated zinc complex embedded in PMMA yields a cost-effective and efficient luminescent solar concentrator.

Theoretical study for improving the efficiency of a novel tetradentate platinum(II) complexes in OLED by molecular modification.

A BODIPY-based fluorescent sensor for heavy and transition metal ions has been synthesized and spectroscopically characterized.

A 6,6′-dimethyl substitution pattern in L_anchor in [Cu(L_anchor)(L_ancillary)]⁺ dyes in DSCs is superior to two phenyl groups, even when steric crowding is alleviated by using asymmetric L_ancillary.

New Cu(I) complexes were prepared, [Cu(N,N)₂]⁺ (1) and [Cu(N,N)(P,P)]⁺ (2–4), and characterized by spectroscopic methods and DFT calculations. It highlights the influence of the different ligands on the photophysical properties of the complexes.

Complexes Zn1 and Cd1 exhibit tunable luminescence properties and they can serve as co-sensitizers to enhance the power-conversion efficiency.

A new method for the preparation of fac-[Re(phen-dione)(CO)₃Cl] and its application for the photochemical reduction of CO₂ to CO have been reported.

Multi-color luminescent Ln-MOFs were synthesized and a white light-emission with a quantum yield up to 32% was achieved.

The present manuscript describes two types of cyanide bridged molybdenum–copper photomagnetic films obtained by the Langmuir–Blodgett technique.

Co(III) complexes of curcumin and phenanthroline bases show remarkable visible-light induced cytotoxicity in HeLa cells but are much less toxic in dark and to normal cells. The complexes bind to HSA with significant affinity.

Five novel fluorene-based gold(I) complexes were synthesized, these luminogens exhibited AIE or aggregate fluorescence change properties.

A multifunctional fluorescent and colorimetric chemosensor for Zn²⁺, Al³⁺, Fe²⁺ and Fe³⁺ was designed and synthesized.

A family of 3D lanthanide organic frameworks with H₂PIP has been synthesized and structurally characterized. The tunable luminescence and slow magnetic relaxation behaviour are investigated.

A dual-functional metal–organic-framework can selectively sense Zn²⁺ and Fe³⁺ ions over mixed metal ions and displays size-selective catalysis towards cyanosilylation of aldehydes.

Low cost copper phthalocyanine has been used as hole-transporting material for the construction of organolead halide solid state perovskite solar cells.

The nitro explosive detecting mechanism of a luminescent MOF sensor is revealed from the viewpoint of analyte–sensor interactions.

Easily prepared, biocompatible, and oxygen-sensitive optical probes with a large two-photon cross-section: towards inexpensive quantitative oxygen imaging in vivo.

The oxidation and reduction of water is a key challenge in the production of chemical fuels from electricity.

The ‘longer’ picture: emission bio-imaging over microsecond time frame with scanning, multi-photon posphorescence-lifetime-imaging-microscopy (PLIM).

Self-assembled platinum compounds resulting in stable, highly emissive and long-lived species are reported for cell imaging.

A new water soluble rhodamine-based ratiometric dual ‘off–on–off’ probe can selectively detect Hg²⁺ ions in ppb level through time dependent FRET process with reversibility in presence of S²⁻ anions.

Three new heterometallic coordination polymers (CPs) have been obtained following a synthetic strategy of introducing AgX (X = NO₃⁻, ClO₄⁻, CF₃SO₃⁻) to react with a metalloligand [Ni(acac)₂(EtOH)₂]_n (1). The ions in compounds 2–4 are crucial factors for the formation of the different structures.

Five europium complexes have been assessed for their ability to stain live plant cells, roots and pollen tubes using time resolved imaging and spectroscopy.

A pair of new ruthenium based donor-π-chromophore sensitizers (K1 and K2) have demonstrated greatly improved performance in NiO based p-type dye sensitized solar cells (p-DSCs) compared to devices incorporating ‘traditional’ ruthenium sensitizers.

Novel visible-light-driven Bi₂WO₆/BiOBr composite photocatalysts have been successfully synthesized by a facile one-pot solvothermal method in the presence of reactable ionic liquid [C₁₆mim]Br.