Browsing by Author "GUNNLAUGSSON, THORFINNUR"
Now showing items 1-20 of 50
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3-Urea-1,8-naphthalimides are good chemosensors: a highly selective dual colorimetric and fluorescent ICT based anion sensor for fluoride
(2011)he 1,8-naphthalimide sensor 1 was developed as a colorimetric and fluorescent sensor for anions. Being the first example of such anion sensors, where the 3-position of the naphthalimide ring is used to incorporate the anion ... -
The application of chiroptical spectroscopy (circular dichroism) in quantifying binding events in lanthanide directed synthesis of chiral luminescent self-assembly structures
(2015)The binding of asymmetrical and optically pure tridentate ligands (L = 1(S) and 1(R)) containing one carboxylic group and 2-naphthyl as an antenna to lanthanide ions (M = La(III) and Eu(III)) was studied in CH3CN, showing ... -
The btp [2,6-bis(1,2,3-triazol-4-yl)pyridine] binding motif: A new versatile terdentate ligand for supramolecular and coordination chemistry
(2014)Ligands containing the btp [2,6-bis(1,2,3-triazol-4-yl)pyridine] motif have appeared with increasing regularity over the last decade. This class of ligands, formed in a one pot ‘click’ reaction, has been studied for various ... -
Colorimetric 'naked-eye' and fluorescent sensors for anions based on amidourea functionalised 1,8-naphthalimide structures: Anion recognition via either deprotonation or hydrogen bonding in DMSO
(2008)The synthesis and the spectroscopic studies of three new amidourea-based sensors for anions, 1?3, are described. These are based on the use of 4-hydrazine-1,8-naphthalimides which upon reaction with isocyanates give rise ... -
Colorimetric and fluorescent anion sensors: An overview of recent developments in the use of 1,8-naphthalimide-based chemosensors
(2010)This critical review focuses on the development of anion sensors, being either fluorescent and/or colorimetric, based on the use of the 1,8-naphthalimide structure; a highly versatile building unit that absorbs and emits ... -
Colorimetric sensing of anions in aqueous solution using a charge neutral, cleft-like, amidothiourea receptor: Tilting the balance between hydrogen bonding and deprotonation in anion recognition
(2008)The design, synthesis and physical evaluation of 1, a visible colorimetric `naked eye? pyridyl based bis-amidothiourea sensor for anions, is described. This charge neutral sensor gives rise to significant changes in the ... -
Crystallographic, 1H NMR and CD studies of sterically strained thiourea anion receptors possessing two stereogenic centres
(2009)The synthesis and structural characterisation of three chiral bis-naphthalene thiourea receptors (1?3) derived from (R)-(+)-1-(1-naphthyl)ethylamine and (S)-(?)-1-(1-naphthyl)ethylamine are reported along with spectroscopic ... -
Demonstration of bidirectional photoinduced electron transfer (PET) sensing in 4-amino-1,8-naphthalimide based thiourea anion sensors
(2009)The thiourea based 4-amino-1,8-naphthalimide molecules 1-5 were designed as fluorescent anion sensors and their photophysical properties investigated upon recognition of biologically relevant anions such as acetate, ... -
Direct observation by time-resolved infrared spectroscopy of the bright and the dark excited states of the [Ru(phen)2(dppz)]2+ light-switch compound in solution and when bound to DNA
(2016)The [Ru(phen)2(dppz)]2+ complex (1) is non-emissive in water but is highly luminescent in organic solvents or when bound to DNA, making it a useful probe for DNA binding. To date, a complete mechanistic explanation for ... -
Displacement assay detection by a dimeric lanthanide luminescent ternary Tb(iii)-cyclen complex: High selectivity for phosphate and nitrate anions
(2014)The luminescent dimeric ternary lanthanide–cyclen complexes (2-(Ln.1)2; Ln = Tb/Eu) were designed and both their self-assembly formation and their ability to detect anions via displacement assays were investigated using ... -
The effect of the 4-amino functionality on the photophysical and DNA binding properties of alkyl-pyridinium derived 1,8-naphthalimides
(2013)The synthesis and characterisation of two cationic pyridinium based 4-amino-1,8-naphthalimide derivatives (2 and 3) are described and compared to those of compound 1. The photophysical properties of 2 and 3 are shown to ... -
The effect on the lanthanide luminescence of structurally simple Eu(III) cyclen complexes upon deprotonation of metal bound water molecules and amide based pendant arms
(2010)A series of substituted 1,4,7,10-tetraazacylcododecane ligands 1?4, possessing sensitizing nitrobenzene or naphthalene antennae, as one of the amide pendant arms, and their complexes with europium(III) were synthesised. ... -
Enhanced photolabelling of luminescent Eu111 centres with a chelating antenna in a micellar nanodomain
(2010)Photoliberation of a caged, chelating naphthalene antenna greatly enhances the luminescence of a EuIII-cyclen complex due to metal-bound water displacement and sensitization by the antenna, giving a lanthanide-labelling ... -
Fluorescence imaging of bone cracks (microdamage) using visibly emitting 1,8-naphthalimide-based PET sensors
(2009)The ability of two 4-amino-1,8-naphthalimides (1 and 2) and anthracene (3) based photoinduced electron transfer (PET) sensors, previously developed in our laboratory, to function as selective imaging agents for exposed ... -
Fluorescent chemosensors: The past, present and future
(2017)Fluorescent chemosensors for ions and neutral analytes have been widely applied in many diverse fields such as biology, physiology, pharmacology, and environmental sciences. The field of fluorescent chemosensors has been ... -
Fluorescent sensing of anions using a bis-quinoxaline amidothiourea based supramolecular cleft; an example of an anion induced deprotonation event
(2010)The quinoxaline 1, possessing a 2,6-pyridyl-based amidothiourea moiety, with the view of forming a pre-organised molecular cleft, was developed as a fluorescent anion sensor. The sensing ability of 1 was evaluated in organic ... -
Fluorescent sensors for ions based on organic structures
(2010)his report highlights some of the developments in 2009 of fluorescent, and in some cases, dual fluorescent and colorimetric, sensors, that are based on organic structures, and that were developed for the sensing/recognition ... -
Glycosidase activated release of fluorescent 1,8-naphthalimide probes for tumor cell imaging from glycosylated 'pro-probes'
(2016)Glycosylated 4-amino-1,8-naphthalimide derivatives possess a native glycosidic linkage that can be selectively hydrolysed in situ by glycosidase enzymes to release the naphthalimide as a fluorescent imaging or therapeutic ... -
Hydrogen bonding interactions and supramolecular networks of pyridine-aryl based thiosemicarbazides and their Zn(II) complexes
(2013)The synthesis of five pyridyl derived thiosemicarbazides, 1-5, is presented. All five were formed in a single step from 2-hydrazinopyridine with commercially available isothiocyanates using microwave assisted synthesis. ...
