Nobody downloaded yet

Supramolecular polymer based on hydrogen bonding - Essay Example

Comments (0) Cite this document
1) Abstract Synthesis and characterization of a series of 1-(3,5-bis(trifluoromethyl)phenyl)-3-phenylurea derivatives serving as starting materials for the creation of supramolecular polymers employing the self-assembly process has been conducted. Supramolecular polymers are different from conventional polymers and are based on non-covalent reversible interactions…
Download full paperFile format: .doc, available for editing
GRAB THE BEST PAPER94.3% of users find it useful
Supramolecular polymer based on hydrogen bonding
Read TextPreview

Extract of sample
"Supramolecular polymer based on hydrogen bonding"

Download file to see previous pages This will lead to the development of inexpensive procedure affording urea based monomers acting the terminals of the chains. According to H1 NMR both 2-(4-(3-(3,5-bis(trifluoromethyl)phenyl)ureido) phenyl)acetic acid and 4-(4-(3-(3,5-bis(trifluoromethyl)phenyl)ureido)phenyl)butanoic acid were impossible to purify using recrystallization. However, the same method of purification was successful in case of using 4-(3-(3,5-bis(trifluoromethyl)phenyl)ureido)benzoic acid as a substrate for purificalion. This purified product was taken on to the next step where the transformation from benzoic acid derivative into two electron acceptor group was conducted introducing tetrabutylammonium hydroxide. Subsequent polymer formation was achieved through self-assembly process between two electron donating group of urea and two electron accepting group of the previously synthesized benzoic acid salt. 2) Conclusions The research provided an account on the supramolecular chemistry of a set of 1-(3,5-bis(trifluoromethyl)phenyl)-3-phenylurea derivatives. It was motivated by the extraordinary chemistry manifested by supramolecular polymers based on hydrogen bonding. The work pointed out to the substantial differences between the obtained substrates. First of all, 2-(4-(3-(3,5-bis(trifluoromethyl)phenyl)ureido)phenyl)acetic acid and 4-(4-(3-(3,5-bis (trifluoromethyl)phenyl)ureido)phenyl)butanoic acid contained impurities which were impossible to remove using recrystallization. In both cases two purification attempts were made, both unsuccessful. On the other hand the same technique was applicable in purifying 4-(3-(3,5-bis(trifluoromethyl)phenyl)ureido)benzoic acid. This fact leads to the conclusion that purification method should be changed in case of the first two derivatives should the synthesis be repeated. For example, flash column chromatography would be an attractive alternative. To conclude, an inexpensive and efficient method that allowed the production of urea based monomers was developed. The reaction affords excellent yields and the process is easy to carry out. Because tetrabutylammonium hydroxide and inorganic bases can be compared in their basic properties, it was possible to obtain the salt of the required monomer in an excellent 70% yield. The work is partly successful and due to time limits it was not possible to repeat each step again. It raised important question which will form the bases of the future work. 3) Future work First of all, in future, it is important to find efficient methods of purification products achieved in experiment one and two. By doing that it will be possible, comparing the yield, draw conclusions about formation of the intermediates. The produced intermediates will be transformed into supramolecular polymer substrates chain-stopping properties of which will be investigated. As it is seen from the first three experiments the only difference between substrates is the number of carbon atoms in the chain next to the benzene ring. For this reason it will be possible to draw conclusions between viscosity of the formed suprapolymer and the number of carbon atoms. Solutions of the mentioned polymers are known to have high viscosity and their rheological behaviour is different in case of different polymers. For example, it was established that polymers containing ureidopyrimidinone units are different from those ...Download file to see next pagesRead More
Cite this document
  • APA
  • MLA
(“Supramolecular polymer based on hydrogen bonding Essay”, n.d.)
Retrieved from
(Supramolecular Polymer Based on Hydrogen Bonding Essay)
“Supramolecular Polymer Based on Hydrogen Bonding Essay”, n.d.
  • Cited: 0 times
Comments (0)
Click to create a comment or rate a document
Supramolecular Polymers based on Hydrogen Bonding
...?Supramolecular Polymers based on Hydrogen Bonding Introduction A supramolecular polymer refers to any kind of self-assembly that results in the creation of polymer-like aggregates occurring through reversible interactions between one or more kinds of components (Martin & Giacalone 2009). Because of the reversible interactions, these polymers can thermally equilibrate with their monomers, unlike conventional polymers (Jadzyn et al. 2006). These polymers are responsive to external stimuli. The mechanical properties of these polymers...
14 Pages(3500 words)Essay
...? BONDING AND GROUNDING Definition The chances of static build-up to spark explosions, costly fires, property damage and injury to workers are a constant danger. Any industrial process will generate static electricity. The purpose of bonding and grounding is to reduce stray voltage problems caused by electrical faults. A Bonding system connects various pieces of conductive equip­ment together to keep them at the same potential. In bonding we join all metallic non electrical parts together in order to establish a continuous electric path across them. Static sparking cannot take place between objects that are the same potential. It is done with the help of copper wire to establish connection between all parts. Bonding is concerned... with the...
2 Pages(500 words)Essay
Hydrogen bonding and drug designs
...of hydrogen bonding studies in drug solubility prediction and drug design. Methodology The aim of this paper is to investigate the effects of hydrogen bonding on the molecular properties of drugs dissolved in water. Additionally, other aspects of the role of hydrogen bonding in drug design will also be dealt with. For the purpose of this review, studies relevant to the aims of this paper were searched via Google Scholar. Three most relevant studies were chosen based on the correlation of their subject of study and the aims of this paper. Results The first study assessed the impact of hydrogen...
5 Pages(1250 words)Term Paper
Basic concepts of chemical bonding
...ions. In a fuel cell, it is made up of materials that facilitate high proton conduction and theoretically zero conduction of electrons (Rob 10). The charge carriers between the anode and the cathode are made of different materials depending on the fuel cell type. This enables the conveying of electrons from the negatively charged anode to the positively charged cathode. This transfer of electrons facilitates the transfer of energy to an external pathway. The overall chemical reaction in the prototype fuel cell is 2H2+ O2 > 2H2O. In order for the reaction to occur in the fuel cell, hydrogen and oxygen must react in order to generate electrons and form bonds (Larminine 43). At the anode electrode,...
3 Pages(750 words)Term Paper
The importance of Hydrogen Bonding in Biology
... of biological structures such as double helix DNA strand. The hydrogen bond plays a critical role in ensuring the DNA structure is stable. Hydrogen bonding in a DNA structure is the chemical interaction responsible for base pairing. Arnold states that hydrogen bond holds together the double helix structure. The base pairs in DNA and RNA strands are connected by hydrogen bonds. The DNA molecule consists of four bases cytosine, guanine, thymine, and adenine. The DNA double helix structure has two polynucleotide strands that are intertwined together. The DNA structure is very stable because of DNA base pairs arrangement, which allows the interaction of the bases (Arnold, 2009). Hydrogen bonding is significant in holding together... the...
4 Pages(1000 words)Essay
Permanent Pair Bonding
...seen in other primates as well as mammals, yet the pair bond between a man and a woman and the pair bond between a man and a child in humans are not comparable to any terrestrial primate’s or mammals’ bonds (Immerman, 2003, p. 138). Therefore, knowledge of primate behavior in pair boding cannot be used to predict the extended pair bond between members of opposite sex and the pan-human social father. “It is suggested that female choice of mating partner shifted in the direction of a canid analogue in which men’s motivations to share resources with the female and to exhibit paternalistic behaviors were positively selected” (Immerman, 2003, p. 138). This lays the basis of...
7 Pages(1750 words)Research Paper
Hydrogen Fuel Cell
...ARE FUEL CELLS A GOOD SUBSTITUTE TO GASOLINE AND ARE THEY THE BEST ONE Introduction Automakers anticipate more government regulations designed to reduce air pollution emission and fuel consumption. Consequently, they are developing a wide range of new technologies. Some fuel providers experiencing from fuel shortages. Now, the price of gasoline and heating oil doubled during the year, and the price of petroleum-related commodities (electricity and natural gas) skyrocketed. "Hydrogen fuel cells offer a solution to the impending world energy crisis which is arising as a result of diminishing fossil fuel reserves and increasing prices. Hydrogen is the most abundant element in the universe and can be produced...
6 Pages(1500 words)Essay
Hydrogen fuel cell technology
... into their conclusions that vehicles powered by hydrogen fuel cells could possibly reach one-quarter of total new car auto sales by 2020 in developed nations (Mello, 2004). The use of hydrogen fuel cells to provide power in industry, residential and vehicle applications would effectively ease air pollution even manufacturing the gas by current methods. Given the fact that fossil fuels are finite and its emissions are threatening every living thing on earth, why have most nations been slow in efforts to reduce the use of oil in favor of more viable energy sources? The consequences of not developing hydrogen-based fuels are a polluted atmosphere which puts the existence of the planet at risk. No matter the costs of development... ...
6 Pages(1500 words)Essay
Maternal bonding
...Maternal Bonding Introduction According to Sosa (1980, pg Over the centuries, the attachment between a mother and her newborn infant has been considered a natural process and it is expected of the mother to care for and nurture her infant. However, the process by which a mother and her baby develop a close relationship is not clearly understood.” The purpose of this paper is to share the results of research on maternal bonding, define the topic of maternal bonding, discuss the key issues surrounding the topic, and develop a management plan including counseling that is evidence based. Defining the Topic According to Sosa (1980, pg. 1), “The human maternal infant...
5 Pages(1250 words)Essay
Female Bonding Practices
...-Flis, 2011, p. 25) However, female bonding practices are different since they break through these conventions and establish new type of relationship that do not fit within the framework of the messages outlined above. The three movies chosen for analysis demonstrate different disconnection from these conventions yet all of them have a different focus on what relationship between women are like outside of the social mindset and perspective on this issue, even though each of these stories has certain traditional plot and rhythm to them. “Sense and Sensibility” was directed by Ang Lee in 1995 and it was based on the novel of the same name written by Jane Austen that tells the story of two Dashwood sisters...
6 Pages(1500 words)Essay
sponsored ads
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Essay on topic Supramolecular polymer based on hydrogen bonding for FREE!
logo footer
Contact us:
Contact Us Now
FREE Mobile Apps:
  • StudentShare App Store
  • StudentShare Google play
  • About StudentShare
  • Testimonials
  • FAQ
  • Blog
  • Free Essays
  • New Essays
  • Essays
  • Miscellaneous
  • The Newest Essay Topics
  • Index samples by all dates
Join us:
Contact Us