Synthesis and organogelating behaviour of amino acid-functionalised triphenylenes
作者:Jonathan E. Meegan、Xiaofei Yang、Ratana Rungsirisakun、Sebastian C. Cosgrove、Richard J. Bushby、Amin Sadeghpour、Michael Rappolt、Rik Brydson、Richard J. Ansell
DOI:10.1039/c7sm00676d
日期:——
been prepared with glycine, L-alanine, L-phenylalanine and L-tryptophan ethyl ester side-chains. The glycine derivative is a good gelator of chloroform, the alanine derivative gels ethanol and toluene, and the phenylalaninederivative gels benzene and toluene. The tryptophan derivative does not gel any of the solvents tested, most probably due to its more bulky structure, but forms microspheres by evaporation-induced
Design, synthesis and evaluation of ratiometric probes for hydrogencarbonate based on europium emission
作者:Yann Bretonniere、Martin J. Cann、David Parker、Rachel Slater
DOI:10.1039/b400734b
日期:——
A series of cationic, zwitterionic and anionic macrocyclic europium complexes has been prepared incorporating a N or C- linked acridone chromophore that allows sensitisation of Eu emission following excitation at 390–410nm. Each of these complexes selectively binds bicarbonate at physiological pH and reversible binding is signalled by a change in the form and relative intensity of the Eu emission spectrum. Affinity for bicarbonate is regulated by overall complex charge and falls within the range required for intracellular or extracellular analyses. Monitoring the ratio of the intensity of Eu emission at up to three wavelengths, e.g. 618/588 or 618/702 nm allows the solution concentration of bicarbonate to be deduced in a background of competing anions such as lactate, citrate and phosphate. Preliminary screens reveal the complexes to be non-toxic to NIH-3T3 cells and to be taken inside the cell, encouraging further study.
Ratiometric probes for hydrogencarbonate analysis in intracellular or extracellular environments using europium luminescence
作者:Yann Bretonnière、Martin J. Cann、David Parker、Rachel Slater
DOI:10.1039/b206286k
日期:——
A series of six, cationic, zwitterionic and anionic Eu complexes has been examined for the analysis of hydrogencarbonate concentration in the intracellular and extracellular ranges; an anionic complex incorporating three glutarate residues and a sensitising acridone chromophore (λexc
= 410 nm) exhibits a 69% change in the intensity ratio of the 618/588 nm Eu emission bands between 5 and 15 mM HCO3– in a cell lysate medium.
为了分析细胞内和细胞外的碳酸氢盐浓度,我们研究了一系列六种阳离子、齐聚离子和阴离子 Eu 复合物;其中一种阴离子复合物含有三个戊二酸残基和一个敏化吖啶酮发色团(λexc = 410 nm),在细胞裂解培养基中,5 至 15 mM HCO3- 之间 618/588 nm Eu 发射带的强度比变化了 69%。
Synthesis and characterisation of highly emissive and kinetically stable lanthanide complexes suitable for usage ‘in cellulo’
作者:Robert A. Poole、Gabriella Bobba、Martin J. Cann、Juan-Carlos Frias、David Parker、Robert D. Peacock
DOI:10.1039/b418964g
日期:——
series of cationic, neutral and anionic europium and terbium complexes based on structurally related, nonadentate ligands based on the cyclen macrocycle. Each complex incorporates a tetraazatriphenylene moiety and overall absolute emission quantum yields are in the range 15-40% in aerated aqueous media. Dynamic quenching of the lanthanide excited state occurs with electron-rich donors, e.g. iodide,
Method of increasing the yield of legumes utilizing
申请人:Stauffer Chemical Company
公开号:US04361439A1
公开(公告)日:1982-11-30
A method of increasing the yield of legumes (soybeans) utilizing a compound of the formula ##STR1## wherein R is selected from the group consisting of --H, --CH.sub.3, --C.sub.2 H.sub.5 and --C.sub.3 H.sub.7.