Citation for published item:ouli¡ eD wrine nd vtzkoD pr¡ ed¡ eri nd fourrierD immnuel nd lideD irginie nd futlerD tephen tF nd lD oert nd ltonD tmes F nd fldekD trie vF nd ve quenniD foris nd endrudD ghntl nd wierD turrin wF nd vmrqueD vurent nd rkerD hvid nd wuryD ylivier @PHIRA 9gomprtive nlysis of onjugted lkynyl hromophoreEtrizylononne lignds for sensitized emission of europium nd teriumF9D ghemistry X iuropen journlFD PH @PVAF VTQT EVTRTF Further information on publisher's website: his is the epted version of the following rtileX ouli¡ eD wFD vtzkoD pFD fourrierD iFD lideD FD futlerD F tFD lD FD ltonD tF FD fldekD F vFD vequenniD fFD endrudD gFD wierD tF wFD vmrqueD vFD rkerD hF nd wuryD yF @PHIRAD gomprtive enlysis of gonjugted elkynyl ghromophore!rizylononne vignds for ensitized imission of iuropium nd eriumF ghemistry E iuropen tournlD PH @PVAX VTQTEVTRTD whih hs een pulished in (nl form t httpXGGdxFdoiForgGIHFIHHPGhemFPHIRHPRISF his rtile my e used for nonEommeril purposes in ordne with ileyEgr erms nd gonditions for selfErhivingF Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Abstract. An extensive series of europium and terbium complexes is described based on the same functionalised tri-azacyclononane carboxylate or phosphinate macrocyclic ligand. The influence of the anionic group, i.e. carboxylate, methyl or phenyl phosphinate, on the photophysical properties is studied and rationalised on the basis of DFT calculated structures. The nature, number and position of aryl electron-donating or withdrawing substituents have been varied systematically within the same phenylethynyl scaffold in order to optimize the brightness of the related europium complexes and investigate their two-photon absorption properties. Finally, the europium complexes were examined in cell imaging applications, whilst selected terbium derivatives were studied as potential oxygen sensors.2 Introduction.

Near-IR organic light-emitting diodes (NIR-OLEDs) are potential light-sources for various sensing applications as OLEDs have unique features such as ultraflexibility and low-cost fabrication. However, the low external electroluminescence (EL) quantum efficiency (EQE) of NIR-OLEDs is a critical obstacle for potential applications. Here, we demonstrate a highly efficient NIR emitter with thermally activated delayed fluorescence (TADF) and its application to NIR-OLEDs. The NIR-TADF emitter, TPA-PZTCN, has a high photoluminescence quantum yield of over 40 % with a peak wavelength at 729 nm even in a highly doped codeposited film. The EL peak wavelength of the NIR-OLED is 734 nm with an EQE of 13.4 %, unprecedented among raremetal-free NIR-OLEDs in this spectral range. TPA-PZTCN can sensitize a deeper NIR fluorophore to achieve a peak wavelength of approximately 900 nm, resulting in an EQE of over 1 % in a TADF-sensitized NIR-OLED with high operational device durability (LT 95 > 600 h.).

The electronic structure of a chiral Yb(III)-based complex is fully determined by taking advantage of experimental magnetic, luminescence, and chiroptical (NIR-ECD and CPL) characterizations in combination with ab-initio wavefunction calculations....