Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation

Search Page

Filters

My NCBI Filters

Results by year

Table representation of search results timeline featuring number of search results per year.

Year Number of Results
1997 1
1998 1
2005 1
2006 1
2010 1
2011 1
2012 3
2013 2
2014 1
2017 1
2018 1
2019 2
2020 4
2021 2
2022 2
2023 5
2024 1

Text availability

Article attribute

Article type

Publication date

Search Results

27 results

Results by year

Filters applied: . Clear all
Page 1
Breaking the plane: B(5)H(5) is a three-dimensional structure.
Hernández-Juárez G, Barroso J, Vásquez-Espinal A, Ortíz-Chi F, Tiznado W, Murillo F, Merino G. Hernández-Juárez G, et al. Phys Chem Chem Phys. 2024 Mar 6;26(10):8089-8093. doi: 10.1039/d4cp00029c. Phys Chem Chem Phys. 2024. PMID: 38381157
In this study, we delved into the structure of B(5)H(5) and questioned some of its accepted assumptions. By exploring the potential energy surface, we found a new three-dimensional structure as the global minimum. ...Our exploration extends to the kinetic stability of vari …
In this study, we delved into the structure of B(5)H(5) and questioned some of its accepted assumptions. By exploring the potential e …
A dihydro-β-agarofuran sesquiterpene from Maytenus boaria.
Paz C, von Dossow D, Tiznado V, Suarez S, Cukiernik FD, Baggio R. Paz C, et al. Acta Crystallogr C Struct Chem. 2017 Jun 1;73(Pt 6):451-457. doi: 10.1107/S2053229617006817. Epub 2017 May 12. Acta Crystallogr C Struct Chem. 2017. PMID: 28579566
The natural compound (1S,4S,5S,6R,7R,8R,9R,10S)-6-acetoxy-4,9,10-trihydroxy-2,2,5a,9-tetramethyloctahydro-2H-3,9a-methanobenzo[b]oxepin-5-yl furan-3-carboxylate, C(22)H(30)O(9), (I), is a beta-agarofuran sesquiterpene isolated from the seeds of Maytenus boaria as part of a …
The natural compound (1S,4S,5S,6R,7R,8R,9R,10S)-6-acetoxy-4,9,10-trihydroxy-2,2,5a,9-tetramethyloctahydro-2H-3,9a-methanobenzo[b]oxepin-5-yl …
Revisiting the potential-energy surface of C(n)Be(3n+2)H(2n+2)(2+) (n = 2-4) clusters: are planar pentacoordinate carbon structures the global minima?
Inostroza D, Vásquez-Espinal A, Leyva-Parra L, García-Argote W, Cerón ML, Yañez O, Tiznado W. Inostroza D, et al. Phys Chem Chem Phys. 2023 Aug 2;25(30):20235-20240. doi: 10.1039/d3cp02056h. Phys Chem Chem Phys. 2023. PMID: 37477548
Using various exploration strategies, in this study, we investigated the potential energy surfaces (PES) of CBe(5)H(5)(+) and C(n)Be(3n+2)H(2n+2)(2+) (n = 2-4) clusters. Previous studies proposed that the planar pentacoordinate carbons (ppCs) were the global minima …
Using various exploration strategies, in this study, we investigated the potential energy surfaces (PES) of CBe(5)H(5)(+) and C(n)Be( …
B7 Be6 B7 : A Boron-Beryllium Sandwich Complex.
Dong X, Tiznado W, Liu YQ, Leyva-Parra L, Liu XB, Pan S, Merino G, Cui ZH. Dong X, et al. Angew Chem Int Ed Engl. 2023 Aug 1;62(31):e202304997. doi: 10.1002/anie.202304997. Epub 2023 Jun 26. Angew Chem Int Ed Engl. 2023. PMID: 37268596
Planar boron clusters have often been regarded as "pi-analogous" to aromatic arenes because of their similar delocalized pi-bonding. However, unlike arenes such as C(5) H(5) (-) and C(6) H(6) , boron clusters have not previously shown the ability to form sandwich co …
Planar boron clusters have often been regarded as "pi-analogous" to aromatic arenes because of their similar delocalized pi-bonding. However …
O3-Annealing Effect on the Etching Resilience of a TiO2/Al2O3 filter Prepared by Atomic Layer Deposition.
Vazquez JL, López J, Bohórquez C, Lizarraga E, Blanco E, Can-Uc B, Romo O, Nedev N, Farías MH, Tiznado H. Vazquez JL, et al. ACS Appl Mater Interfaces. 2023 Aug 30;15(34):40942-40953. doi: 10.1021/acsami.3c07586. Epub 2023 Aug 17. ACS Appl Mater Interfaces. 2023. PMID: 37590996
The relatively short duration of the O(3) annealing process, approximately 1.6 h, makes it a cost-effective alternative compared to using ozone in the ALD process, which can last several hours for thick optical coatings....
The relatively short duration of the O(3) annealing process, approximately 1.6 h, makes it a cost-effective alternative compared to u …
Searching for double σ- and π-aromaticity in borazine derivatives.
Pino-Rios R, Vásquez-Espinal A, Yañez O, Tiznado W. Pino-Rios R, et al. RSC Adv. 2020 Aug 11;10(50):29705-29711. doi: 10.1039/d0ra05939k. eCollection 2020 Aug 10. RSC Adv. 2020. PMID: 35518239 Free PMC article.
Inspired by the double-aromatic (sigma and pi) C(6)H(3) (+), C(6)I(6) (2+), and C(6)(SePh)(6) (2+) ring-shaped compounds, herein we theoretically study their borazine derivative analogues. The systems studied are the cation and dications with formulas B(3)N(3)H(3) ( …
Inspired by the double-aromatic (sigma and pi) C(6)H(3) (+), C(6)I(6) (2+), and C(6)(SePh)(6) (2+) ring-shaped compounds, herein we t …
Antioxidant activity and enzymatic of lichen substances: A study based on cyclic voltammetry and theoretical.
Yañez O, Osorio MI, Osorio E, Tiznado W, Ruíz L, García C, Nagles O, Simirgiotis MJ, Castañeta G, Areche C, García-Beltrán O. Yañez O, et al. Chem Biol Interact. 2023 Feb 25;372:110357. doi: 10.1016/j.cbi.2023.110357. Epub 2023 Jan 21. Chem Biol Interact. 2023. PMID: 36693444 Free article.
These results show a high free radical scavenging activity by means of the release of H(+), suggesting an important antioxidant capacity of these molecules. ...
These results show a high free radical scavenging activity by means of the release of H(+), suggesting an important antioxidant capac …
A Multidimensional Approach to Carbodiphosphorane-Bismuth Coordination Chemistry: Cationization, Redox-Flexibility, and Stabilization of a Crystalline Bismuth Hydridoborate.
Obi AD, Dickie DA, Tiznado W, Frenking G, Pan S, Gilliard RJ Jr. Obi AD, et al. Inorg Chem. 2022 Dec 5;61(48):19452-19462. doi: 10.1021/acs.inorgchem.2c03337. Epub 2022 Nov 22. Inorg Chem. 2022. PMID: 36412917
The redox-flexibility of this framework was evaluated in the high catalytic activity of 1 and 2 for silylation of 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO) under mild conditions (50 C, 24-96 h) and low catalyst loadings (5-10 mol %), which suggests the accessibility of s …
The redox-flexibility of this framework was evaluated in the high catalytic activity of 1 and 2 for silylation of 2,2,6,6-tetramethylpiperid …
Definition of a nucleophilicity scale.
Jaramillo P, Pérez P, Contreras R, Tiznado W, Fuentealba P. Jaramillo P, et al. J Phys Chem A. 2006 Jul 6;110(26):8181-7. doi: 10.1021/jp057351q. J Phys Chem A. 2006. PMID: 16805506
We have started evaluating the experimental indices of nucleophilicity proposed by Legon and Millen on the basis of the measure of the force constants derived from vibrational frequencies using a probe dipole H-X (X = F,CN). The correlation among some theoretical parameter …
We have started evaluating the experimental indices of nucleophilicity proposed by Legon and Millen on the basis of the measure of the force …
27 results