91´«Ã½ Technology
91´«Ã½ technology patented donor-acceptor systems which leverages years of innovation and developed in Preece and Robinson group in University of Birmingham. To date 91´«Ã½ have synthesised ~100 compounds which has allowed us to obtain a detailed understanding of the molecular factors which control:
91´«Ã½ technology allows chemically modify donor molecular structure in order to tune the absorbance for specific properties.
High absorption extinction coefficients – ~100 000 M-1 cm-1 and lmax, ~30 000 M-1 cm-1 @ 355 nm
Due to large aromatic area, 91´«Ã½ materials are suitable for multi-photon absorption experiments. To read more about this, go to Multiphoton Microscopy section.
91´«Ã½ technology based on donor-acceptor system is very chemically flexible allows to incorporate different groups onto the molecular systems. Thus, to date 91´«Ã½ have over 100 different compounds with emission covering the whole visible spectrum from blue to red (with further development on-going to move redder).
91´«Ã½ fluorescent materials have high fluorescence Quantum Yield (30-70%).
Coupled with a high molar absorptivity of ≈ 100000 which resulting in bright emission. This high brightness leads to a high sensitivity allowing for the detection of small quantities of fluorophore ≈ 10-9 M
91´«Ã½ fluorescent materials have exceptional stability in solution for long periods of time.
91´«Ã½ fluorescent materials have good solubility in a range of organic solvents.
91´«Ã½ fluorescent materials can be dispersed in aqueous solvents and aqueous buffers via pre-dissolution in organic solvent such as DMSO.
91´«Ã½ fluorescent materials are soluble in: Chloroform, Tetrahydrofuran (THF), Dichloromethane (DCM), Toluene, Cyclohexanone, Cyclohexane, Di-ethyl ether, Ethyl Acetate, Acetone.
91´«Ã½ fluorescent materials show exception molecular stability in solid with most dyes having >250oC thermal stability.
91´«Ã½ fluorescent materials have good processability into polymer matrices via spin coating, melting and 3D printing, whilst maintaining fluorescence.
91´«Ã½ technology based on donor-acceptor system is very chemically flexible allows to incorporate different groups onto the molecular systems. Currently, 91´«Ã½ can incorporate reactive functional groups such as -CO2H, -N3, -NH2, -active esters, -SH, -alkenes, -Br.
Furthermore, 91´«Ã½ technology is versatile platform to create new fluorescent probes for analyte sensing application.
91´«Ã½ fluorophores:
- Undergo fluorescence quenching in the presence of electron deficient aromatics
- Undergo fluorescent modulation upon binding metal cations in an appended crown ether moiety
- Undergo fluorescence shifts upon modulation of the subphase pH
91´«Ã½ materials display Hexagonal Columnar Discotic Liquid Crystal (DLC) mesophases – a state of matter intermediate between liquid and solid. This mesophase gives rise to an anisotropy in photophysical properties such as light polarisation, light emission and charge transport. In addition, 91´«Ã½ materials are able to form nanoparticles and nanowires.
In addition, 91´«Ã½ materials are able to form nanoparticles and nanowires.
Triphenoxazoles are organic insulators with charge mobility around ~ 10-3 cm2/Vs. When irradiated with UV light, 91´«Ã½ materials become photoconductors. The photocurrent display up to 2 orders of magnitude increase compared to the hexakis(alkyloxy)triphenylenes (TpH), which is the archetypical photoconductor.
