A5000164775- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Crystallography and molecular interactions
- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Lanthanide and Transition Metal Complexes
- Molecular Sensors and Ion Detection
- Magnetism in coordination complexes
- Metal-Organic Frameworks: Synthesis and Applications
- Supramolecular Chemistry and Complexes
- Organic Electronics and Photovoltaics
- Porphyrin and Phthalocyanine Chemistry
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Catalytic Cross-Coupling Reactions
- Conducting polymers and applications
- Metal complexes synthesis and properties
- Nanoplatforms for cancer theranostics
- Supramolecular Self-Assembly in Materials
- Advanced biosensing and bioanalysis techniques
- Perovskite Materials and Applications
- Photochromic and Fluorescence Chemistry
- Advanced Photocatalysis Techniques
- Advanced Polymer Synthesis and Characterization
- Synthesis and Properties of Aromatic Compounds
- Organometallic Complex Synthesis and Catalysis
Trinity College Dublin
2019-2024
University College Dublin
2019-2021
22q11 Ireland
2020-2021
University of St Andrews
2014-2020
St. Andrews University
2015-2019
This perspective illustrates our approach in the design of heteroleptic cationic iridium(III) complexes for optoelectronic applications, especially as emitters electroluminescent devices. We discuss changes photophysical properties a consequence modification electronics either cyclometalating (C^N) or ancillary (N^N) ligands. then broach impact on these function structure both types explain trends behaviour using combination rationally designed structure–property relationship studies and...
Combining a sterically bulky, electron-deficient cyclometalating C<sup>∧</sup>N ligands with an electron rich, highly rigidified N<sup>∧</sup>N ligand gives iridium complex, that achieves extraordinarily bright blue emission (<italic>Φ</italic><sub>PL</sub> = 90%; <italic>λ</italic><sub>max</sub> 459 nm in MeCN) for cationic complex.
We demonstrate a turn-on strategy for blue-emitting [Ir(C^N)<sub>2</sub>(P^P)]PF<sub>6</sub> complexes and apply them to EL devices.
We report the first examples of highly luminescent di-coordinated Pd(0) complexes.
The synthesis, structural and photophysical characterisation, LEEC devices of four novel, cationic iridium(<sc>iii</sc>) complexes are reported.
A structure–property relationship study of neutral heteroleptic (1 and 2, [Ir(C∧N)2(L∧X)]) homoleptic (3 4, fac-[Ir(C∧N)3]) Ir(III) complexes (where L∧X = anionic 2,2,6,6-tetramethylheptane-3,5-dionato-κO3,κO6 (thd) C∧N a cyclometalating ligand bearing pentafluorosulfanyl (−SF5) electron-withdrawing group (EWG) at the C4 (HL1) C3 (HL2) positions phenyl moiety) is presented. These have been fully structurally characterized, including by single-crystal X-ray diffraction, their electrochemical...
The synthesis and photophysical study of two dinuclear copper(I) complexes bearing a 2-(1H-imidazol-2-yl)pyrimidine bridging ligand are described. tetrahedral coordination sphere each copper center is completed through the use bulky bis(phosphine) ligand, either DPEphos or Xantphos. Temperature-dependent studies demonstrated emission combination phosphorescence thermally activated delayed fluorescence for both complexes, an intense (ΦPL = 46%) was observed crystalline sample one reported....
The btp [2,6-bis(1,2,3-triazol-4-yl)pyridine] ligand is a terdentate that, analogously to many other ligands such as 2,2′;6,2″-terpyridine (terpy), has been shown effectively bind cationic metals through the central pyridyl nitrogen atom and triazolyl atoms; however, in contrast classical ligands, btps also possess unique capacity anions well. Polarisation of hydrogen atoms triazole rings allows them form strong bonding interactions with both anionic guests self-association. This dual...
Herein we report the synthesis and optoelectronic characterisation of three deep blue-emitting cationic iridium complexes, form [Ir(dFppy)(2)(N^N)]PF(6), bearing biimidazole-type N^N ancillary ligands (dFppyH = 2-(2,4-difluorophenyl)pyridine). Complex 1 contains parent biimidazole, biim, while 2 a dimethylated analog, dMebiim, 3 an ortho-xylyl-tethered biimidzole, o-xylbiim. We explore strategy tethering biimidazole in order to rigidify complex increase photoluminescent quantum yield,...
A series of six novel [Ir(C^N)2(N^N)](PF6) complexes (C^N is one two cyclometalating ligands: 2-phenyl-4-(2,4,6-trimethylphenyl)pyridine, MesppyH, or 2-(napthalen-1-yl)-4-(2,4,6-trimethylphenyl)pyridine, MesnpyH; N^N denotes four neutral diamine 4,4'-di-tert-butyl-2,2'-bipyridine, dtbubpy, 1H,1'H-2,2'-bibenzimiazole, H2bibenz, 1,1'-(α,α'-o-xylylene)-2,2'-bibenzimidazole, o-xylbibenz 2,2'-biquinoline, biq) were synthesised and their structural, electrochemical photophysical properties...
The first examples of phosphorescent platinum(<sc>ii</sc>) complexes bearing pentafluorosulfanyl (–SF<sub>5</sub>) substituted cyclometalating ligands (C^N) are reported.
Two new heteroleptic iridium(III) complexes bearing an aryldiazoimidazole ligand are reported. These differ structurally with respect to the protonation state of imidazole ring, but can be independently accessed by varying synthetic conditions. Their structures have been unequivocally confirmed X-ray crystal structure analysis, surprising differences in structural parameters two complexes. The strongly absorbing nature free diazoimidazole is enhanced these iridium complexes, protonated...
An investigation into the self-assembly of two 4-amino- and a 4-bromo-1,8-naphthalimide (Nap) based structures (1-3) possessing an appended glycan unit, from protic polar media, is presented. The results demonstrate formation complex hierarchical luminescent aggregates, wherein morphologies, sizes spherical were highly dependent on both media Nap structure. Upon cleaving native glycosidic bond, using enzyme, structure/morphology 3 in buffered solution was significantly transformed.
Condensation of a pyridyl-2-carbaldehyde derivative with 2-(bromoethyl)amine hydrobromide gave tetracyclic pyrido[1,2-a]pyrido[1',2':3,4]imidazo-[2,1-c]-6,7-dihydropyrazinium dications in excellent yields. Crystal structures and NOE data demonstrated the helical character dications, dihedral angles between two pyrido groups ranging from 28-45°. An intermediate synthesis was also characterized. A much brighter emission compared to literature helicenes has been found, quantum yields as high 60...
A rhenium(<sc>i</sc>) naphthalimide complex [Re(CO)<sub>3</sub>(5-PAN)Cl] (Re(5-PAN); 5-PAN = 1-(1,10-phenanthroline)-4-nitro-naphthalimide) was synthesized, characterized, and evaluated as a photocatalyst for CO<sub>2</sub> reduction.
The synthesis of two new polymers made from P(E-alt-MA) (poly(ethylene-alt-maleic anhydride) and possessing 2,6-bis(1,2,3-triazol-4-yl)pyridine (btp) ligand side chains in 3 6 mol%, respectively (P1 P2, respectively) is described. These were shown to be soluble MeOH solution and, the case P1, also water, while P2 needed prolonged heating enable water dissolution. Btp ligands are known for coordinating both d- f-metal ions so, herein, we demonstrate by using UV-Vis absorption, fluorescence...
The synthesis of a chiral bis-tridentate (1,2,3-triazol-4-yl)-picolinamide (tzpa) ligand is described and its coordination chemistry with Cu(NO3)2 [Cu(MeCN)4]PF6 explored in the crystalline phase as well solution. Chiral [2 × 2] tetranuclear square grid complexes [Cu4(H21)4](NO3)8 [Cu4(H1)4](PF6)4 were observed, crystallographically analysed, these being linkage isomers N4O2 N5O spheres, respectively. These come about by an unusual situ amide deprotonation coordination, which accompanies CuI...
A structure-property study demonstrates switching from ACQ to AIE in a family of luminescent naphthalimides.
Herein the synthesis of 1,8-naphthalimides functionalised as 3,4-dihydroxy-1,8-naphthalimide (catechol, Nap-Cat) and corresponding 15-crown-5 (Nap-Crown) is reported.