The Role of Template Structure and Synergism between Inorganic and Organic Structure Directing Agents in the Synthesis of UTL Zeolite

2010 ◽  
Vol 22 (11) ◽  
pp. 3482-3495 ◽  
Author(s):  
Oleksiy V. Shvets ◽  
Natalia Kasian ◽  
Arnošt Zukal ◽  
Jiří Pinkas ◽  
Jiří Čejka
Keyword(s):  
Organic Structure ◽  
Template Structure ◽  
Structure Directing Agents ◽  
Inorganic And Organic

Cooperative effects of inorganic and organic structure-directing agents in ZSM-5 crystallization

2018 ◽  
Vol 3 (1) ◽  
pp. 159-170 ◽  
Author(s):  
Aseem Chawla ◽  
Rui Li ◽  
Rishabh Jain ◽  
R. John Clark ◽  
James G. Sutjianto ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Molecular Modelling ◽  
Synergistic Effects ◽  
Cooperative Effects ◽  
Bulk Crystallization ◽  
Organic Structure ◽  
Structure Directing Agents ◽  
Inorganic And Organic

A combination of bulk crystallization studies and molecular modelling are used to elucidate the role of dual inorganic/organic SDAs in ZSM-5 synthesis. Our findings reveal unexpected synergistic effects on crystallization times and physicochemical properties.

A BRIEF ANALYSIS OF TIME-PREPOSITIONS IN THE RUSSIAN LANGUAGE

2019 ◽  
Vol 18 (28) ◽  
pp. 187-195
Author(s):  
Yabing Zhang
Keyword(s):  
Foreign Language ◽  
Foreign Students ◽  
Russian Language ◽  
Parts Of Speech ◽  
Organic Structure ◽  
Part Of Speech ◽  
True Meaning ◽  
Oral Speech ◽  
The Russian Language

This article is devoted to the problem of using Russian time-prepositions by foreigners, especially by the Chinese. An analysis of modern literature allows the author to identify the main areas of the work aimed at foreign students’ development of the skills and abilities to correctly build the prepositional combinations and continuously improve the communication skills by means of the Russian language. In this paper, the time-prepositions in the Russian language have been analyzed in detail; some examples of polysemantic use of prepositions, their semantic and stylistic shades alongside with possible errors made by foreign students are presented. The results of the study are to help in developing a system of teaching Russian time-prepositions to a foreign language audience, taking into account their native language, on the basis of the systemic and functional, communicative and activity-centred basis. The role of Russian time-prepositions in constructing word combinations has been identified; the need for foreign students’ close attention to this secondary part of speech has been specified. It has been stated that prepositions are the most dynamic and open type of secondary language units within the quantitative and qualitative composition of which regular changes take place. The research substantiates the need that students should be aware of the function of time-preposition in speech; they are to get acquainted with the main time-prepositions and their meanings, to distinguish prepositions and other homonymous parts of speech as well as to learn stylistic shades of time-prepositions. Some recommendations related to the means of mastering time-prepositions have been given: to target speakers to assimilate modern literary norms and, therefore, to teach them how to choose and use them correctly by means of linguistic keys that are intended to fill the word with true meaning, to give it an organic structure, an inherent form and an easy combinability in the texts and oral speech.

scholarly journals Alcohol-assisted synthesis of high-silica zeolites in the absence of organic structure-directing agents

2021 ◽  
Vol 42 (4) ◽  
pp. 563-570
Author(s):  
Huimin Luan ◽  
Chi Lei ◽  
Ye Ma ◽  
Qinming Wu ◽  
Longfeng Zhu ◽  
...  
Keyword(s):  
Organic Structure ◽  
High Silica ◽  
High Silica Zeolites ◽  
Structure Directing Agents

Coordination chemistry of mercury(ii) halide complexes: a combined experimental, theoretical and (ICSD & CSD) database study on the relationship between inorganic and organic units

2020 ◽  
Vol 49 (34) ◽  
pp. 11859-11877 ◽  
Author(s):  
Ali Samie ◽  
Alireza Salimi ◽  
Jered C. Garrison
Keyword(s):  
Coordination Chemistry ◽  
Coordination Sphere ◽  
Predominant Role ◽  
Database Study ◽  
Halide Complexes ◽  
The Relationship ◽  
Inorganic And Organic

The coordination sphere can be influenced by many factors of inorganic and organic units. Despite the predominant role of inorganic unit in coordination sphere determination, organic unit can change it via one major or cooperativity of minor effects.

scholarly journals Zeolite Synthesis Using Imidazolium Cations as Organic Structure-Directing Agents

2019 ◽  
Vol 10 (1) ◽  
pp. 303
Author(s):  
Paloma Vinaches ◽  
Sibele Pergher
Keyword(s):  
Research Study ◽  
Research Area ◽  
Zeolite Synthesis ◽  
New Materials ◽  
Imidazolium Cation ◽  
Organic Structure ◽  
Imidazolium Cations ◽  
Structure Directing Agents ◽  
Direction Effect

Imidazolium-derivative cations are very interesting molecules used as organic structure-directing agents (OSDAs) for zeolite synthesis, widening the possibilities of new materials and applications in this research area. In this review, the studies performed at LABPEMOL using this kind of compound are presented after a quick overview on imidazolium derivatives. The first zeolite synthesis results that started this research study were obtained with 1-butyl-3-methylimidazolium chloride. Then, the design of new OSDAs based on the imidazolium cation, such as 1,2,3-triethylimidazolium, 2-ethyl-1,3-dimethylimidazolium and 1,2,3-triethyl-4-methylimidazolium, is reported. Afterwards, the structure-direction effect caused by the introduction of heteroatoms with already-published imidazolium derivatives (for example, the Al3+ insertion into zeolite frameworks with two different OSDAs and the silicoaluminophosphate (SAPO) synthesis using 2-ethyl-1,3,4 trimethylimidazolium cations) is discussed. Finally, we also present a quick overview of some achievements of other laboratories.

scholarly journals Revisiting the seed-assisted synthesis of zeolites without organic structure-directing agents: insights from the CHA case

RSC Advances ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 5304-5315 ◽  
Author(s):  
Grandprix T. M. Kadja ◽  
Iftitah R. Kadir ◽  
Adroit T. N. Fajar ◽  
Veinardi Suendo ◽  
Rino R. Mukti
Keyword(s):  
Crystallization Behaviour ◽  
Structure Directing Agent ◽  
Organic Structure ◽  
Structure Directing Agents

Herein, the crystallization behaviour of the CHA zeolite synthesized via the seed-assisted method and in the absence of an organic structure-directing agent has been revisited.

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