02145nas a2200277   4500008004100000022001400041245008300055210006900138260000800207300001400215490000700229520124200236100002101478700003301499700002301532700002301555700002301578700001901601700001901620700002401639700002801663700002401691700001701715700002001732856011501752       2025                        eng d  a1948-718500aSupercooled liquid phases of luminescent zero dimensional metal halide hybrids0 aSupercooled liquid phases of luminescent zero dimensional metal   cSEP  a9391-94000 v163 a<p>
	Chemical design of metal halide hybrids (MHHs) with suppressed melting point (T-m) allows access to glassy phases from their liquid-melts. Thermal phase change (crystal-melt-glass) properties of glassy MHHs (with glass transition temperature T-g &gt; room temperature) have been exploited for device applications. However, room temperature stable supercooled liquid (SCL) MHHs (with T-g &lt; room temperature), originating from glass-SCL phase change, remain inaccessible. Here, a molecular design strategy is reported to access ambient stable, melt-processable, SCL multimetallic bromide hybrids (Mn2+,Cd2+; Mn2+,Zn2+; Benzyltributylammonium) with low T-g (15-16 degrees C), low T-m (90-100 degrees C), green luminescence, and high optical transparency. Structural, optical, thermal, and computational analyses highlight chemical design principles and support dopant (Mn2+) based luminescence. Rheological measurements confirm the SCL phase that shows thermal hysteresis and estimate relaxation time scales. This work provides a new material platform showcasing enhanced melt-processability for fabrication of moldable devices, unravelling chemical makeup-property correlation and expanding the material phase types of MHHs.</p>
1 aDas, Deep, Kumar1 aMarayathungal, Jumana, Hasin1 aPalakkolil, Athira1 aSarma, Dhritismita1 aKhan, Akram, Aadil1 aKumar, Praveen1 aKudlu, Ashwath1 aChoudhary, Mahendra1 aHathwar, Venkatesha, R.1 aPujala, Ravi, Kumar1 aMahata, Arup1 aKundu, Janardan  uhttps://library.ncl.res.in/content/supercooled-liquid-phases-luminescent-zero-dimensional-metal-halide-hybrids02622nas a2200253   4500008004100000022001400041245017400055210006900229260000800298300001400306490000700320520168000327100002102007700002302028700001902051700002302070700002902093700001902122700004002141700002402181700001702205700002002222856012602242       2026                        eng d  a0897-475600aBright dual-phase organic luminescence from zero-dimensional lead halide hybrids via sensitized thermally activated delayed fluorescence for multifunctional applications0 aBright dualphase organic luminescence from zerodimensional lead   cMAY  a4668-46810 v383 a<p>
	Metal halide hybrids have long celebrated their halometallate moieties as the luminescent center, leaving organic cations behind. Although the thermally activated delayed fluorescence (TADF) strategy has enabled efficient solid-state organic emitters, the complex molecular design required for TADF emitters has limited their facile integration into metal halide hybrid architectures. Here, we demonstrate a versatile strategy wherein a nonemissive organic moiety (benzyltributylammonium) is incorporated into a zero-dimensional disphenoidal Pb-halide hybrid, [(C19H34N)2PbCl4], resulting in efficient TADF-based dual-phase organic emission sensitized by halometallate units in the solid state (crystalline; amorphous). These materials exhibit strong PLQY (similar to 85%) and tunable organic luminescence (blue emission in crystalline phase; cyan emission in amorphous phase) modulated by the packing extent of organic moiety. [PbX4]2- units act as absorptive centers that sensitize organic cations showing TADF-based strong emission. Ground and excited state density functional theory calculations reveal the unique origin of sensitized TADF organic luminescence. Rheological measurements characterize relaxation dynamics of glass &lt;-&gt; supercooled liquid transitions, establishing correlations between molecular packing, phase, and emission characteristics. This first demonstration of dual-phase, sensitized TADF-based organic luminescence in lead halide hybrids establishes a new design paradigm that bridges molecular and solid-state photophysics, opening avenues for multifunctional applications in LEDs, optical thermometry, and security technologies.</p>
1 aDas, Deep, Kumar1 aSarma, Dhritismita1 aKumar, Praveen1 aKhan, Akram, Aadil1 aMadhusoodhananan, Mahesh1 aKudlu, Ashwath1 aAjithkumar, Thalasseril, Govindanku1 aPujala, Ravi, Kumar1 aMahata, Arup1 aKundu, Janardan  uhttps://library.ncl.res.in/content/bright-dual-phase-organic-luminescence-zero-dimensional-lead-halide-hybrids-sensitized