01895nas a2200241 4500008004100000022001400041245011600055210006900171260000800240300001100248490000800259520107900267653001301346653001701359653002001376653001901396100001801415700001801433700001801451700002301469700003001492856013101522 2020 eng d a0143-720800aTuning phosphorescence features of triphenylamines by varying functional groups and intermolecular interactions0 aTuning phosphorescence features of triphenylamines by varying fu cFEB a1079310 v1733 a

Organic room temperature phosphorescent materials are known for their synthetic feasibility, tunable phosphorescence wavelength and lifetime, etc. Hence new design strategies have been applied on various fluorophores to improve phosphorescence features. Among those, triphenylamines are phosphorescence active due to the presence of nitrogen atom, propeller molecular structure, and intermolecular interactions in the crystal state. Here we have studied the room temperature phosphorescence of a series of triphenylamines with various functional groups. Detailed studies have shown that the phosphorescence can be fine-tuned by functional group modification. A long phosphorescence lifetime around 100 ms at room temperature in air can be achieved by the interplay of intermolecular interactions, singlet-triplet energy gap and extent of intersystem crossing using functional group variation. Interestingly, an exciplex assisted ultralong phosphorescence lifetime (more than 20 times) is observed for a combination of triphenylamine and naphthalenemonoimide in air.

10aExciplex10afluorescence10aPhosphorescence10atriphenylamine1 aGoudappagouda1 aAsokan, Kiran1 aNayak, Rashmi1 aKrishnan, Retheesh1 aBabu, Sukumaran, Santhosh uhttp://library.ncl.res.in/content/tuning-phosphorescence-features-triphenylamines-varying-functional-groups-and-intermolecular01604nas a2200229 4500008004100000022001400041245012100055210006900176260000900245300001400254490000700268520078700275100003301062700002101095700002601116700001801142700001801160700001801178700002601196700003001222856012201252 2022 eng d a1359-734500aDonor-acceptor based solvent-free organic liquid hybrids with exciplex emission and room temperature phosphorescence0 aDonoracceptor based solventfree organic liquid hybrids with exci cFEB  a1998-20010 v583 aSolvent-free organic liquids are well-known for their excellent luminescence features. Hence, the recent developments in this area have marked them as potential emitters with high quantum yield and enhanced processability. The support of an available liquid matrix enables doping to deliver hybrid liquids with intriguing luminescence features. In this direction, we report solvent-free liquid donor-acceptor pairs with exciplex emission and room temperature phosphorescence at very low acceptor loading. The underlying weak intermolecular interactions have been revealed by 2D NMR techniques and theoretical calculations. The formation of large-area thin films by exciplex and phosphorescent liquid hybrids will encourage the development of scalable lighting and display materials.1 aWakchaure, Vivek, Chandrakan1 aVeer, Sairam, D.1 aNidhankar, Aakash, D.1 aGoudappagouda1 aNayak, Rashmi1 aAsokan, Kiran1 aRavindranathan, Sapna1 aBabu, Sukumaran, Santhosh uhttp://library.ncl.res.in/content/donor-acceptor-based-solvent-free-organic-liquid-hybrids-exciplex-emission-and-room02350nas a2200229 4500008004100000022001400041245011400055210006900169260000800238490000700246520155000253653001601803653000801819653002001827653002301847100001801870700002701888700003101915700003001946700001901976856012501995 2022 eng d a1861-472800aScalable mechanochemical synthesis of beta-ketoenamine-linked covalent organic frameworks for methane storage0 aScalable mechanochemical synthesis of betaketoenaminelinked cova cDEC0 v173 a

In the current scenario of increased pollution and releasing toxic gases by burning petroleum products, switching to natural gas is more promising for reducing CO2 emissions and air pollutants. Hence, research on Liquefied Natural Gas and Compressed Natural Gas is gaining more value. However, natural gas primarily consists of CH4, which has less energy density than conventional fuels. Interestingly, since the C-H ratio of CH4 gas is 1 : 4, it is easily combustible, gives less carbon footprint, and reduces unburnt hydrocarbon pollution. Hence, research on storing and transporting CH4 has utmost importance, and porous materials are one of the suitable candidates for storing CH4. Herein we report the scalable synthesis of highly porous and crystalline covalent organic frameworks for storing CH4 at room temperature and pressure. Two COFs, namely, Tp-Azo and Tp-Azo-BD(Me)(2), synthesized in 1 kg at similar to 45 g batch scale using a Planetary mixer, displayed a maximum BET surface area of around 3345 m(2)/g, and 2342 m(2)/g and CH4 storage of 174.10 cc/cc and 151 cc/cc, respectively. A comparison of the CH4 sorption of Tp-Azo and Tp-Azo-BD(Me)(2) COFs synthesized in different batches has a variation of only +/- 5 cc/cc and shows the consistency in bulk scale synthesis of COFs. The cyclic equilibrium CH4 adsorption studies showed the COFs are stable with consistent CH4 adsorption and desorption cycles. The present study is a step towards the scalable mechanochemical synthesis of COFs for gas storage applications.

10aCH4 storage10aCOF10aporous material10ascalable synthesis1 aAsokan, Kiran1 aPatil, Manoj, Krishnat1 aMukherjee, Shatabdi, Porel1 aSukumaran, Santhosh, Babu1 aNandakumar, T. uhttp://library.ncl.res.in/content/scalable-mechanochemical-synthesis-beta-ketoenamine-linked-covalent-organic-frameworks02418nas a2200313 4500008004100000022001400041245009600055210006900151260000800220490000700228520138200235653001701617653001801634653003201652653002901684653001001713653003401723653002601757100002701783700001701810700001801827700003001845700002401875700002101899700002101920700001901941700002401960856012001984 2023 eng d a1614-683200a2D layered nanomaterials as fillers in polymer composite electrolytes for lithium batteries0 a2D layered nanomaterials as fillers in polymer composite electro cAPR0 v133 a

Polymer composite electrolytes (PCEs), i.e., materials combining the disciplines of polymer chemistry, inorganic chemistry, and electrochemistry, have received tremendous attention within academia and industry for lithium-based battery applications. While PCEs often comprise 3D micro- or nanoparticles, this review thoroughly summarizes the prospects of 2D layered inorganic, organic, and hybrid nanomaterials as active (ion conductive) or passive (nonion conductive) fillers in PCEs. The synthetic inorganic nanofillers covered here include graphene oxide, boron nitride, transition metal chalcogenides, phosphorene, and MXenes. Furthermore, the use of naturally occurring 2D layered clay minerals, such as layered double hydroxides and silicates, in PCEs is also thoroughly detailed considering their impact on battery cell performance. Despite the dominance of 2D layered inorganic materials, their organic and hybrid counterparts, such as 2D covalent organic frameworks and 2D metal-organic frameworks are also identified as tuneable nanofillers for use in PCE. Hence, this review gives an overview of the plethora of options available for the selective development of both the 2D layered nanofillers and resulting PCEs, which can revolutionize the field of polymer-based solid-state electrolytes and their implementation in lithium and post-lithium batteries.

10a2D materials10aclay minerals10acovalent organic frameworks10ametal-organic frameworks10aMXene10apolymer composite electrolyte10asolid-state batteries1 aVijayakumar, Vidyanand1 aGhosh, Meena1 aAsokan, Kiran1 aSukumaran, Santhosh, Babu1 aKurungot, Sreekumar1 aMindemark, Jonas1 aBrandell, Daniel1 aWinter, Martin1 aNair, Jijeesh, Ravi uhttp://library.ncl.res.in/content/2d-layered-nanomaterials-fillers-polymer-composite-electrolytes-lithium-batteries02015nas a2200205 4500008004100000022001400041245010700055210006900162260000900231300001600240490000700256520126800263100002301531700004001554700001801594700001801612700001801630700003001648856013101678 2023 eng d a1144-054600aDonor-acceptor-based two-dimensional polymer as a supercapacitor electrode with long cycling stability0 aDonoracceptorbased twodimensional polymer as a supercapacitor el cOCT  a18049-180540 v473 a

The high demand for energy and energy-storage devices urged organic 2D polymers as a potential candidate in this area. One of the major attractions of 2D polymers in electrochemical applications is their long cycling stability due to their rigid and porous structure. Herein, we developed a 2D polymer comprised of donor-acceptor units exhibiting reasonably good performance as a supercapacitor. The 2D polymer displayed a maximum specific capacitance of 218 F g-1 at a current rate of 0.1 A g-1, a higher power density of 4648.35 W kg-1, and an energy density of 7.05 W h kg-1. In a cycling stability test, it demonstrated a capacitance retention of 70% over 10 000 continuous charge-discharge cycles at a current rate of 2.5 A g-1. Such long cycling stability was attributed to the donor-acceptor units and the crystalline nature of the polymer. The sensible selection of the building blocks of the 2D polymers is crucial for the performance and hence provides scope for improvement. An organic donor-acceptor-based 2D polymer, a promising candidate for energy storage devices, displays a specific capacitance of 218 F g-1, a power density of 4648.35 W kg-1, an energy density of 7.05 W h kg-1, and a capacitance retention of 70% over 10 000 cycles.

1 aBhagyasree, T., M.1 aPuthiyaveetil, Priyanka, Pandinhare1 aKumar, Viksit1 aAsokan, Kiran1 aSreekumar, K.1 aBabu, Sukumaran, Santhosh uhttp://library.ncl.res.in/content/donor-acceptor-based-two-dimensional-polymer-supercapacitor-electrode-long-cycling-stability02000nas a2200289 4500008004100000022001400041245010500055210006900160260000800229490000700237520101800244653002201262653002701284653002201311653001601333653002301349100002901372700003301401700001801434700001701452700002001469700002101489700002001510700002401530700003001554856012601584 2023 eng d a1433-785100aOligothiophene-ring-strapped perylene bisimides: functionalizable coaxial donor-acceptor macrocycles0 aOligothiopheneringstrapped perylene bisimides functionalizable c cJAN0 v623 a

Aesthetic designs from nature enable new knowledge to be gained and, at the same time, inspire scientific models. In this context, multicomponent macrocycles embody the advantage of precisely positioning the structural units to achieve efficient communication between them. However, the construction of a functionalizable macrocycle for ultrafast charge separation and stabilization has not been attempted. Herein, we report the synthesis, crystal structure, and transient absorption of a new functionalizable macrocycle consisting of an oligothiophene-ring-strapped perylene bisimide. Transient absorption results point to a sequential improvement in charge separation and stabilization from the macrocycle to the corresponding linear dimer and 2D polymer due to the unique design. Our macrocycle design with a supportive spatial arrangement of the donor and acceptor units will inspire the development of more complex synthetic systems with exciting electron-transfer and charge-separation features.

10aCharge Separation10aDonor-Acceptor Systems10aElectron Transfer10aMacrocycles10aPerylene Bisimides1 aVeer, Sairam, Dnyaneshwa1 aWakchaure, Vivek, Chandrakan1 aAsokan, Kiran1 aDixit, Ruchi1 aGoswami, Tanmay1 aSaha, Ramchandra1 aGonnade, Rajesh1 aGhosh, Hirendra, N.1 aBabu, Sukumaran, Santhosh uhttp://library.ncl.res.in/content/oligothiophene-ring-strapped-perylene-bisimides-functionalizable-coaxial-donor-acceptor