41240-76-0

Upstream product

• 110-53-2 1-Bromopentane 
• 103-90-2 4-acetaminophenol 

Downstream Products

• 39905-50-5 4-pentyloxyaniline 
• 123948-12-9 (E)-4-[(4-pentyloxyphenyl)diazenyl]phenol 
• 123947-98-8 6-[4-(4-Pentyloxy-phenylazo)-phenoxy]-hexan-1-ol 
• 200512-67-0 11-[4-(4-Pentyloxy-phenylazo)-phenoxy]-undecan-1-ol 
• 129992-44-5 N-n-Propyl-N'-(4-pentyloxyphenyl)-piperazine 
• 129992-45-6 N-n-Butyl-N'-(4-pentyloxyphenyl)-piperazine 
• 129992-46-7 N-n-Pentyl-N'-(4-pentyloxyphenyl)-piperazine 
• 129992-47-8 N-n-Hexyl-N'-(4-pentyloxyphenyl)-piperazine 
• 129992-48-9 N-n-Heptyl-N'-(4-pentyloxyphenyl)-piperazine 
• 129992-49-0 N-n-Octyl-N'-(4-pentyloxyphenyl)-piperazine 
• 129992-50-3 N-n-Nonyl-N'-(4-pentyloxyphenyl)-piperazine 

Relevant academic research and scientific papers

Study of the molecular structure on liquid crystal properties with reference to thermotropic azoester derivatives

An azoester homologues series: RO?C6H4?COO?C10H6?N?N?C6H4?OC5H11 (para) as novel liquid crystalline (LC) materials has been synthesized and studied with a view to understanding and establishing the effects of molecular structure on LC properties with reference to laterally substituted phenyl ring and terminally substituted ?OR and ?OC5H11 (n) groups; including ?COO? and ?N?N? central bridges. Novel homologous series of thermotropic LC variety consists of thirteen homologues (C1 to C18). C1 to C3 derivatives are nonliquid crystal (NLC); C4 is only nematogenic and C5 to C18 are smectogenic plus nematogenic. All the mesogenic homologues (C4 to C18) are enantiotropically nematogenic or/and smectogenic as confirmed by a polarizing optical microscopy (POM) equipped with a heating stage. Transition curves Cr-I/M, Sm?N, and N?I behaved in normal manner in a phase diagram. Odd-even effect is exhibited by Sm?N and N?I transition curves. Analytical, spectral and thermal data confirms the molecular structure of novel homologues. Novel azoester series is predominantly nematogenic and partly smectogenic whose mesogenic temperatures ranges minimum to maximum from 79.0°C to 162.0°C. Thermal stability for smectic and nematic are 128.2°C and 147.7 °C, respectively. Thus, it is a middle ordered melting type of novel series whose total mesophaselength ranges from 20.0°C to 56.0°C. Textures of nematic are threaded or schlieren and that of smectic are smectic A or C.

Synthesis and mesomorphic properties of 2,4-bis(4′-n-pentyloxybenzoyloxy)- benzylidine-4″- n-alkoxyaniline

The synthesis and mesomorphic properties of a new series of 2,4-bis(4′-npentyloxybenzoyloxy)- benzylidine-4″ -n-alkoxyaniline (DC5An) are reported. The molecular structure of compounds was confirmed by FTIR, 1H-NMR, 13C-NMR, mass spectroscopy and elemental analysis. The mesomorphic properties were studied by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM) measurements. All compounds of the series exhibit nematic (N) and smectic C (SmC) phases. The first four homologues (DC5A1-DC5A4) display a N mesophase, whereas the highest homologues (DC5A5-DC5A10) exhibit an enantiotropic dimorphism N and SmC phases. The mesomorphic properties of the present series are compared and discussed with other structurally related series.

Studies of calamitic liquid crystalline compounds involving ester-azo central linkages with a biphenyl moiety

Two mesogenic homologous series involving ester-azo central linkages with a biphenyl moiety have been synthesized, such as 4'-[(4-n-alkoxyphenyl)diazenyl] biphenyl-4-ol (series I) and 4'-[(4-n-alkoxyphenyl) diazenyl]-4-butoxy phenyl biphenyl-4-carboxylate (series II). Azobiphenyl of series I having a free hydroxyl group with strong hydrogen bonding exhibits a high-temperature enantiotropic smectic phase. Whereas in series II, compounds containing C 1-C8 carbon atoms exhibit only a monotropic smectic phase and compounds with C10, C12, C14, and C 16 atoms show an enantiotropic smectic phase. These compounds were characterized by elemental analysis, FT-IR, 1H-NMR, and mass spectral studies. The phase transition and mesogenicity of these substances were studied by polarizing optical microscopic and differential scanning calorimetric techniques. Their thermal stabilities and other characteristics are discussed. Copyright Taylor &Francis Group, LLC.

Role of terminal heterocyclic ring on mesomorphic properties of homologous series

Two new homologous series of compounds with a heterocyclic ring having sulfur and oxygen as a hetero atom derived from p-hydroxy acetophenone and alkoxy aniline containing cinnamate-azomethine as central linkages have been synthesized. viz. 4(furalacryloxy) α-methyl benzylidine-4′-alkoxy aniline and 4(thianylacryloxy) α-methyl benzylidine-4′-alkoxy aniline. The compound of both the series have been characterized by elemental analysis, FT-IR, 1H-NMR, and mass spectrometry method. Their liquid crystalline properties have been investigated by optical polarizing microscopy and differential scanning calorimetry (DSC) studies. All the derivatives are mesomorphic in nature showing the nemetic phase. The mesomorphic properties of the present two series are compared with other structurally related series to evaluate the effect of thiophene and furan on mesomorphism. Copyright Taylor & Francis Group, LLC.

Mesogenicity of organophosphazenes: The effect of phosphazene rings and side groups on the phase transition

Cyclotriphosphazene and cyclotetraphosphazene derivatives with mesogenic 4-N-(4-alkoxyphenyl)iminomethyl)phenoxy and 4-(4′-alkoxy) biphenoxy moieties were synthesized. Schiff base moiety has higher mesomorphic stability than that in biphenyl moiety both in cyclotriphosphazene and cyclotetraphosphazene. Cyclotriphosphazenes possess higher thermal stability in the mesomorphic phase than the cyclotetraphosphazenes, suggesting the difference in the molecular structure.

Functionalization of poly(metallocenes) via hydrosilylation: Synthesis and properties of thermotropic liquid crystalline poly(ferrocenylsilanes)

Hydrosilylation of poly(ferrocenylmethylhydrosilane) [Fe(η-C5H4)2SiMeH]n with 1-hexene and ethyl acrylate was achieved using Karstedt's catalyst with degrees of functionalization of ca 80%. Using a similar strategy, 4-pentoxy-4′-hydroxyhexanoxyazobenzene or 4-pentoxy-4′-hydroxyundecyloxyazo-benzene acrylate side chains were successfully attached to the poly(metallocene) main chain. The resulting functionalized poly(ferrocenylsilanes) represent the first examples of calamitic thermotropic side chain liquid crystal polymers with ferrocene groups in the backbone.

Novel calamitic side-chain metallomesogenic polymers with ferrocene in the backbone: Synthesis and properties of thermotropic liquid-crystalline poly(ferrocenylsilanes)

Novel thermotropic, metallomesogenic polymers with a poly(ferrocenylsilane) main chain and 4-pentoxy-4′-hydroxyhexanoxyazobenzene or 4-pentoxy-4′-hydroxyundecyloxyazobenzene acrylate side chains have been prepared; each material displays a nematic mesophase.

Synthesis and Mesogenic Properties of N-n-alkyl-N'-(4-n-Pentyloxyphenyl)-Piperazines

The N-n-alkyl-N'-(4-n-pentyloxyphenyl)-piperazines (4) exhibit ordered smectic phases at temperatures below 100 deg C.For 3, 4, 5 and 6 carbons in the alkyl chain, two smectic phases are present and for 7, 8 and 9 carbons only one smectic phase is present.The ΔH values for 4, 5, 6 and 7 carbons are anomalous.From optical and X-ray data, the smectic phases are identified as probably smectic E and B phases.