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1. A novel minimal motif for left-handed G-quadruplex formation

Author:
Das, Poulomi; Winnerdy, Fernaldo Richtia; Maity, Arijit; Mechulam, Yves; Phan, Anh Tuân
Source:
Chemical communications 2021 v.57 no.20 pp. 2527-2530
ISSN:
1364-548X
Subject:
crystal structure,   etc   ; DNA; thymine;     Show all 3 Subjects
Abstract:
... A recent study on the left-handed G-quadruplex (LHG4) DNA revealed a 12-nt minimal motif GTGGTGGTGGTG with the ability to independently form an LHG4 and to drive an adjacent sequence to LHG4 formation. Here we have identified a second LHG4-forming motif, GGTGGTGGTGTG, and determined the X-ray crystal structure of an LHG4 involving this motif. Our structural analysis indicated the role of split gua ...
DOI:
10.1039/d0cc08146a

2. Laves phases: a review of their functional and structural applications and an improved fundamental understanding of stability and properties

Author:
Stein, Frank; Leineweber, Andreas
Source:
Journal of materials science 2021 v.56 no.9 pp. 5321-5427
ISSN:
0022-2461
Subject:
crystal structure,   etc   ; alloys; hydrogen;     Show all 3 Subjects
Abstract:
... Laves phases with their comparably simple crystal structure are very common intermetallic phases and can be formed from element combinations all over the periodic table resulting in a huge number of known examples. Even though this type of phases is known for almost 100 years, and although a lot of information on stability, structure, and properties has accumulated especially during the last about ...
DOI:
10.1007/s10853-020-05509-2

3. Research on the photoluminescence properties of Cu²⁺-doped perovskite CsPbCl₃ quantum dots

Author:
Wu, Ronghua; Bai, Zhongchen; Jiang, Jinguo; Yao, Heng; Qin, Shuijie
Source:
RSC advances 2021 v.11 no.15 pp. 8430-8436
ISSN:
2046-2069
Subject:
crystal structure,   etc   ; photoluminescence; photostability;     Show all 3 Subjects
Abstract:
... CsPbX₃ (X = Cl, Br, and I) quantum dots (QDs) and Cu²⁺-doped CsPbCl₃ QDs with different Cu-to-Pb molar ratios were synthesized via a solvent-based thermal synthesis method. The photoluminescence (PL) properties of these Cu²⁺-doped CsPbCl₃ QDs were also investigated in this study. The results showed that with the increase in the Cl⁻ concentration the surface defects of CsPb(Cl/Br)₃ QDs increased, w ...
DOI:
10.1039/d0ra09043c

4. Correction: Synthesis, crystal structure and antibacterial studies of dihydropyrimidines and their regioselectively oxidized products

Author:
Huseynzada, Alakbar E.; Jelsch, Christian; Akhundzada, Haji Vahid N.; Soudani, Sarra; Ben Nasr, Cherif; Israyilova, Aygun; Doria, Filippo; Hasanova, Ulviyya A.; Khankishiyeva, Rana F.; Freccero, Mauro
Source:
RSC advances 2021 v.11 no.14 pp. 7903
ISSN:
2046-2069
Subject:
crystal structure,   etc   ; oxidation; regioselectivity;     Show all 3 Subjects
Abstract:
... Correction for ‘Synthesis, crystal structure and antibacterial studies of dihydropyrimidines and their regioselectively oxidized products’ by Alakbar E. Huseynzada et al., RSC Adv., 2021, 11, 6312–6329, DOI: 10.1039/D0RA10255E. ...
DOI:
10.1039/d1ra90082j

5. CH/π-interaction-driven self-assembly of tetraphenylethylene derivatives into the face to face arrangement

Author:
Yu, Lirong; Zhang, Mengxing; Lou, Dandan; Li, Jiale; Wang, Xi; Bai, Ming
Source:
RSC advances 2021 v.11 no.4 pp. 2377-2382
ISSN:
2046-2069
Subject:
crystal structure,   etc   ; carbon; ethylene;     Show all 3 Subjects
Abstract:
... For tetraphenylethene (TPE) derivatives, it is difficult to determine the arrangement of the molecules in the aggregation state because disordered aggregation usually occurs. To solve the problem, we have explored a novel and facile strategy to investigate the aggregation mode of a TPE derivative framework in which the two neighboring ortho carbons of two phenyl moieties at the same ethylene carbo ...
DOI:
10.1039/d0ra10572d

6. Controlled synthesis of Cu-based SAPO-18/34 intergrowth zeolites for selective catalytic reduction of NOx by ammonia

Author:
Zhang, Shoute; Ming, Shujun; Guo, Lei; Bian, Ce; Meng, Ying; Liu, Qian; Dong, Yahao; Bi, Jiajun; Li, Dan; Wu, Qin; Qin, Kaiwei; Chen, Zhen; Pang, Lei; Cai, Weiquan; Li, Tao
Source:
Journal of hazardous materials 2021 v.414 pp. 125543
ISSN:
0304-3894
Subject:
crystal structure,   etc   ; ammonia; durability; zeolites;     Show all 4 Subjects
Abstract:
... Cu-based SAPO-18, SAPO-18/34 intergrowth and SAPO-34 zeolites were applied for the selective catalytic reduction of NOₓ by ammonia (NH₃-SCR) catalysts. Comprehensive characterization results revealed that the SAPO-18/34 with higher amount and strength of acid sites could facilitate the generation of more isolated copper ions (Cu²⁺ and Cu⁺) and suppress the formation of CuOₓ, which might account fo ...
DOI:
10.1016/j.jhazmat.2021.125543

7. Enhanced thermal stability and large piezoelectric properties of Sm-doped Pb(Sc1/2Nb1/2)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3 multifunctional ceramics

Author:
Zhou, Hongqiao; Yang, Shengyu; Xi, Zengzhe; Dong, Shasha; Guo, Feifei; Long, Wei; Li, Xiaojuan; Fang, Pinyang; Dai, Zhonghua
Source:
Journal of materials science 2021 v.56 no.21 pp. 12121-12131
ISSN:
0022-2461
Subject:
crystal structure,   etc   ; temperature; thermal stability;     Show all 3 Subjects
Abstract:
... The crystal structure, electric properties, thermal stability and optical properties of Sm-doped 0.15Pb(Sc₁/₂Nb₁/₂)O₃–0.50Pb(Mg₁/₃Nb₂/₃)O₃–0.35PbTiO₃ (xSm-doped PSN-PMN-PT) ternary multifunctional ceramics were investigated. It is found that the volume fraction of tetragonal phase increases with the increase in Sm³⁺ concentration. The ceramics with x = 0.005 and 0.01 show pure perovskite structure ...
DOI:
10.1007/s10853-021-06053-3

8. Effective stability enhancement in ZnO-based perovskite solar cells by MACl modification

Author:
Liu, Chunyu; Wu, Wei; Zhang, Dezhong; Li, Zhuowei; Ren, Guanhua; Han, Wenbin; Guo, Wenbin
Source:
Journal of materials chemistry A 2021 v.9 no.20 pp. 12161-12168
ISSN:
2050-7496
Subject:
crystal structure,   etc   ; absorbance; chlorides; protonation;     Show all 4 Subjects
Abstract:
... Low-temperature solution-processed ZnO has decided advantages in flexible and tandem solar cells, while its application encountered difficulties in perovskite optoelectronic devices due to chemical instability at the ZnO–perovskite interface. It has been proven to be a result of protonation reaction between ZnO and organic cations in perovskite materials, thus accelerating the perovskite decomposi ...
DOI:
10.1039/d1ta02697f

9. Structure of detergent-activated BAK dimers derived from the inert monomer

Author:
Birkinshaw, Richard W.; Iyer, Sweta; Lio, Daisy; Luo, Cindy S.; Brouwer, Jason M.; Miller, Michelle S.; Robin, Adeline Y.; Uren, Rachel T.; Dewson, Grant; Kluck, Ruth M.; Colman, Peter M.; Czabotar, Peter E.
Source:
Molecular cell 2021 v.81 no.10 pp. 2123-2134.e5
ISSN:
1097-2765
Subject:
crystal structure,   etc   ; apoptosis; detergents; mitochondria;     Show all 4 Subjects
Abstract:
... A body of data supports the existence of core (α2–α5) dimers of BAK and BAX in the oligomeric, membrane-perturbing conformation of these essential apoptotic effector molecules. Molecular structures for these dimers have only been captured for truncated constructs encompassing the core domain alone. Here, we report a crystal structure of BAK α2–α8 dimers (i.e., minus its flexible N-terminal helix a ...
DOI:
10.1016/j.molcel.2021.03.014

10. Comment on “Trimorphs of 4-bromophenyl 4-bromobenzoate. Elastic, brittle, plastic” by S. Saha and G. R. Desiraju, Chem. Commun., 2018, 54, 6348

Author:
Whittaker, Jacob J.; Brock, Aidan J.; Grosjean, Arnaud; Pfrunder, Michael C.; McMurtrie, John C.; Clegg, Jack K.
Source:
Chemical communications 2021 v.57 no.40 pp. 4974-4975
ISSN:
1364-548X
Subject:
crystal structure,   etc   ; brittleness; nitrobenzoic acids;     Show all 3 Subjects
Abstract:
... A re-refinement of the published but chemically implausible, crystal structure of “Form III” of 4-bromophenyl 4-bromobenzoate shows that it is not a polymorph, but instead a co-crystal containing both 4-bromophenyl 4-bromobenzoate (≈25%) and likely 4-bromophenyl 4-nitrobenzoate (≈75%). ...
DOI:
10.1039/d0cc07668f

11. Tunable Broad Light Emission from 3D “Hollow” Bromide Perovskites through Defect Engineering

Author:
Spanopoulos, Ioannis; Hadar, Ido; Ke, Weijun; Guo, Peijun; Mozur, Eve M.; Morgan, Emily; Wang, Shuxin; Zheng, Ding; Padgaonkar, Suyog; Manjunatha Reddy, G. N.; Weiss, Emily A.; Hersam, Mark C.; Seshadri, Ram; Schaller, Richard D.; Kanatzidis, Mercouri G.
Source:
Journal of the American Chemical Society 2021 v.143 no.18 pp. 7069-7080
ISSN:
1520-5126
Subject:
crystal structure,   etc   ; new family; photoluminescence;     Show all 3 Subjects
Abstract:
... Hybrid halide perovskites consisting of corner-sharing metal halide octahedra and small cuboctahedral cages filled with counter cations have proven to be prominent candidates for many high-performance optoelectronic devices. The stability limits of their three-dimensional perovskite framework are defined by the size range of the cations present in the cages of the structure. In some cases, the sta ...
DOI:
10.1021/jacs.1c01727

12. Beta-strand-mediated dimeric formation of the Ig-like domains of human lamin A/C and B1

Author:
Ahn, Jinsook; Lee, Jinwook; Jeong, Soyeon; Kang, So-mi; Park, Bum-Joon; Ha, Nam-Chul
Source:
Biochemical and biophysical research communications 2021 v.550 pp. 191-196
ISSN:
0006-291X
Subject:
crystal structure,   etc   ; head; humans; research;     Show all 4 Subjects
Abstract:
... Lamins are nuclear intermediate filament proteins that play an essential role in maintaining the nuclear structure by forming a 3-D meshwork. Lamins consist of the N-terminal unstructured head, the coiled-coil rod domain, and the C-terminal tail, which is mostly unstructured except for the Ig-like domain. To date, the Ig-like domain has been characterized as a monomeric structure. Here, we determi ...
DOI:
10.1016/j.bbrc.2021.02.102

13. The guest polymer effect on the dissolution of drug–polymer crystalline inclusion complexes

Author:
Chen, Lu; Huang, Yanbin
Source:
RSC advances 2021 v.11 no.22 pp. 13091-13096
ISSN:
2046-2069
Subject:
crystal structure,   etc   ; drugs; hydrophilicity; hydrophobicity;     Show all 4 Subjects
Abstract:
... A drug–polymer crystalline inclusion complex (IC) is a novel solid form of drug, in which drug molecules form parallel channels, and linear polymer chains reside in these channels. In this study, we used carbamazepine (CBZ) as a model drug, and directly studied the effect of different types of guest polymers on the dissolution properties of drug–polymer ICs. We successfully prepared ICs formed fro ...
DOI:
10.1039/d1ra01926k

14. Effects of A site doping on the crystallization of perovskite films

Author:
Zhang, Caiyi; Wang, Yanbo; Lin, Xuesong; Wu, Tianhao; Han, Qifeng; Zhang, Yiqiang; Han, Liyuan
Source:
Journal of materials chemistry A 2021 v.9 no.3 pp. 1372-1394
ISSN:
2050-7496
Subject:
crystal structure,   etc   ; absorbance; cations; crystallization;     Show all 4 Subjects
Abstract:
... Perovskite materials with ABX₃ chemical formula have a high absorption coefficient, high mobility and low exciton binding energies, and thus are promising candidates for the next generation of photovoltaic devices. Doping various cations on the A site has been reported to be beneficial for improving the performance and stability of perovskite solar cells. However, the mixed cation compositions mak ...
DOI:
10.1039/d0ta08656h

15. Singlet fission from upper excited singlet states and polaron formation in rubrene film

Author:
Wu, Tong; Ni, Wenjun; Gurzadyan, Gagik G.; Sun, Licheng
Source:
RSC advances 2021 v.11 no.8 pp. 4639-4645
ISSN:
2046-2069
Subject:
crystal structure,   etc   ; absorption; electronics; fluorescence;     Show all 4 Subjects
Abstract:
... Femtosecond fluorescence up-conversion and transient absorption pump-probe setups are applied to study the relaxation dynamics of the lower and upper excited singlet electronic states in easy-to-make rubrene films. Upon 250 nm (4.96 eV) excitation, singlet fission was observed directly from S₂ state bypassing S₁ state within 30 fs i.e. breaking the classical Kasha rule. From the transient absorpti ...
DOI:
10.1039/d0ra10780h

16. Poly(L-lactic acid) monofilaments for biodegradable braided self-expanding stent

Author:
Zhao, Gutian; Li, Xin; Tian, Yuan; Wu, Gensheng; Zhang, Yi; Jiang, Wei; Yang, Juekuan; Ni, Zhonghua
Source:
Journal of materials science 2021 v.56 no.21 pp. 12383-12393
ISSN:
0022-2461
Subject:
crystal structure,   etc   ; biodegradability; modulus of elasticity;     Show all 3 Subjects
Abstract:
... Although poly(L-lactic acid) (PLLA) is the widely used material for bioresorbable stents, publications on PLLA braided stents are still lacking. In this paper, the PLLA monofilaments were prepared via melt spinning and solid-state drawing. The total draw ratios are from 2.8 to 30.8. The properties of the monofilaments, such as crystallinity, elastic modulus, elongation at break, were characterized ...
DOI:
10.1007/s10853-021-06021-x

17. High iodine uptake in two-dimensional covalent organic frameworks

Author:
Zhang, Lingyan; Li, Jinheng; Zhang, Huixin; Liu, Yu; Cui, Yumeng; Jin, Fenchun; Wang, Ke; Liu, Guiyan; Zhao, Yanli; Zeng, Yongfei
Source:
Chemical communications 2021 v.57 no.45 pp. 5558-5561
ISSN:
1364-548X
Subject:
crystal structure,   etc   ; adsorption; iodine; surface area;     Show all 4 Subjects
Abstract:
... Two 2-dimensional covalent organic frameworks (COFs; TJNU-203 and TJNU-204) with high crystallinity and large specific surface area are rationally fabricated using a three-connected distorted building block and linear linkers. The two COFs show high iodine uptake (5.885 g g⁻¹ for TJNU-203 and 5.335 g g⁻¹ for TJNU-204) on account of physical–chemical adsorption, which make them one among the best p ...
DOI:
10.1039/d1cc00737h

18. Macrocycle-Based Metal–Organic Frameworks with NO₂-Driven On/Off Switch of Conductivity

Author:
Ma, Yun-Xiang; Gao, Bin; Li, Yongxin; Wei, Wei; Zhao, Yanli; Ma, Jian-Fang
Source:
ACS applied materials & interfaces 2021 v.13 no.23 pp. 27066-27073
ISSN:
1944-8252
Subject:
crystal structure,   etc   ; adsorption; electrochemical capacitors; hydrogen bonding;     Show all 4 Subjects
Abstract:
... Conductive metal–organic frameworks (MOFs) have a wide range of applications in supercapacitors, electrocatalysts, and fuel cells, while gas-driven conductive MOFs have not yet been synthesized so far. Herein, we report a gas-driven conductive MOF (A) constructed from calix[4]resorcinarene macrocycle and Co(II) cations, which shows the conductivity enhancement by about eight orders of magnitude th ...
DOI:
10.1021/acsami.1c05481

19. Crystal Structure of the [FeFe]-Hydrogenase Maturase HydE Bound to Complex-B

Author:
Rohac, Roman; Martin, Lydie; Liu, Liang; Basu, Debashis; Tao, Lizhi; Britt, R. David; Rauchfuss, Thomas B.; Nicolet, Yvain
Source:
Journal of the American Chemical Society 2021 v.143 no.22 pp. 8499-8508
ISSN:
1520-5126
Subject:
crystal structure,   etc   ; crystallization; ligands; organometallic compounds; tyrosine;     Show all 5 Subjects
Abstract:
... [FeFe]-hydrogenases use a unique organometallic complex, termed the H cluster, to reversibly convert H₂ into protons and low-potential electrons. It can be best described as a [Fe₄S₄] cluster coupled to a unique [2Fe]H center where the reaction actually takes place. The latter corresponds to two iron atoms, each of which is bound by one CN– ligand and one CO ligand. The two iron atoms are connecte ...
DOI:
10.1021/jacs.1c03367

20. Morphology-Dependent Phase Selectivity of Cobalt Sulfide during Nanoparticle Cation Exchange Reactions

Author:
Butterfield, Auston G.; McCormick, Connor R.; Veglak, Joseph M.; Schaak, Raymond E.
Source:
Journal of the American Chemical Society 2021 v.143 no.21 pp. 7915-7919
ISSN:
1520-5126
Subject:
crystal structure,   etc   ; cation exchange; cobalt sulfide; nanocrystals;     Show all 4 Subjects
Abstract:
... Achieving phase selectivity during nanoparticle synthesis is important because crystal structure and composition influence reactivity, growth, and properties. Cation exchange provides a pathway for targeting desired phases by modifying composition while maintaining crystal structure. However, our understanding of how to selectively target different phases in the same system is limited. Here, we de ...
DOI:
10.1021/jacs.1c03478