Z. Wang, X. Li, and Y. Huang, Direct ?-Vinylidenation of Aldehydes and Subsequent Cascade: Gold and Amine Catalysts Work Synergistically, Angew. Chem, vol.125, pp.14469-14473, 2013.

, Angew. Chem. Int. Ed, vol.52, pp.14219-14223, 2013.

A. B. Weinstein and S. S. Stahl, Palladium catalyzed aryl C-H amination with O 2 via in situ formation of peroxide-based oxidant(s) from dioxane, Catal. Sci. Technol, vol.4, pp.4301-4307, 2014.

Z. Wang, L. Li, and Y. Huang, A General Synthesis of Ynones from Aldehydes via Oxidative C?C bond Cleavage under Aerobic Conditions, J. Am. Chem. Soc, vol.136, pp.12233-12236, 2014.

S. Shao, Y. Zhu, K. Ma, H. Zhao, Y. Qiu et al., Cd): syntheses, structures, and photoluminescence properties, Two M(II)-1,5-NDS-dafo supramolecular architectures, vol.66, pp.2702-2711, 2013.

W. Li, B. Liu, Y. Qian, L. Xie, J. Wang et al., Synthesis and characterization of diazafluorene-based oligofluorenes and polyfluorene, Polym. Chem, vol.4, pp.1796-1802, 2013.

K. Ocakoglu, E. Harputlu, P. Guloglu, and S. Erten-ela, Design and synthesis of heteroleptic ruthenium (II) complexes and their applications in nanocrystalline TiO 2 solar cells

, Inorg. Chem. Commun, vol.24, pp.118-142, 2012.

W. B. Heuer, H. Xia, M. Abrahamsson, Z. Zhou, S. Ardo et al.,

A. Meyer and G. J. , Reaction of Ru II Diazafluorenone Compound with Nanocrystalline TiO 2 Thin Film, Inorg. Chem, vol.49, pp.7726-7734, 2010.

W. Li, H. Wu, Y. Li, C. Hu, M. Yi et al.,

F. Zhao, X. Shi, N. Qian, Y. Wang, C. Wei et al., Facile synthesis and self-assembly of diazafluorenone-based p-n (donor-acceptor) organic semiconductors, Tetrahedron, vol.68, pp.8216-8221, 2012.

J. L. Figueirinhas and R. Y. Dong, NMR of bent-core nematogens: a mini-review

. Reson and . Chem, , vol.52, pp.614-624, 2014.

T. Lin, I. R. Nemitz, C. J. Mcgrath, C. P. Schubert, H. Yokoyama et al.,

R. P. Rosenblatt and C. , Nematic molecular core flexibility and chiral induction, Phys. Rev. E, vol.88, 2013.

H. Yoon, S. Kang, M. Lehmann, J. O. Park, M. Srinivasarao et al., Homogeneous and homeotropic alignment of bent-core uniaxial and biaxial nematic liquid crystals, Soft Matter, vol.7, pp.8770-8775, 2011.

M. Lehmann, C. Köhn, J. L. Figueirinhas, G. Feio, C. Cruz et al., Biaxial Nematic Mesophases from Shape-Persistent Mesogens with a Fluorenone Bending Unit

, Chem. Eur. J, vol.16, pp.8275-8279, 2010.

M. Lehmann, S. Kang, C. Köhn, S. Haseloh, U. Kolb et al., Shape-persistent V-shaped mesogens-formation of nematic phases with biaxial order, J. Mater. Chem, vol.16, pp.4326-4334, 2006.

C. Chi, C. Im, V. Enkelmann, A. Ziegler, G. Lieser et al., Monodisperse Oligofluorenes with Keto Defect as Models to Investigate the Origin of Green Emission From Polyfluorenes: Synthesis, Self-Assembly, and Photophysical Properties, Chem. Eur. J, vol.11, pp.6833-6845, 2005.

M. Lehmann and J. Levin, Rigid Phenylene Ethynylene Units

. Centre, An Approach to Biaxial Nematogens?, Mol. Cryst. Liq. Cryst, vol.411, pp.1315-1323, 2004.

V. Percec, M. Glodde, T. K. Bera, Y. Miura, I. Shiyanovskaya et al.,

V. S. Balagurusamy, P. A. Heiney, I. Schnell, A. Rapp, H. Spiess et al., Self-organization of supramolecular helical dendrimers into complex electronic materials, Nature, vol.419, pp.384-387, 2002.

K. Takatoh and M. Sakamoto, Formation and Properties of Ferroelectric Liquid Crystalline Compound Containing -C(O)-S-O-Linkage, Bull. Chem. Soc. Jpn, vol.64, pp.2720-2723, 1991.

K. Takatoh and M. Sakamoto, Liquid Crystalline Derivatives Containing Fluorene and Fluorenone Structures, Mol. Cryst. Liq. Cryst, vol.182, pp.339-349, 1990.

K. Takatoh, K. Sunohara, and M. Sakamoto, Mesophase Transition of Series Materials Containing Fluorene, Fluorenone and Biphenyl Structures with Chiral End Groups

. Cryst, Liq. Cryst, vol.164, pp.167-178, 1988.

K. Okamoto, S. Nakajima, A. Itaya, and S. Kusabayashi, Charge-carrier Transport in Nematic 2-(p-Decyloxybenzylideneamino)-9-Fluorenone, Bull. Chem. Soc. Jpn, vol.56, pp.3545-3548, 1983.

K. Okamoto, S. Nakajima, M. Ueda, A. Itaya, and S. Kusabayashi, Electrical Dark-and Photo-conductivities of 2-(p-Decyloxybenzilideneamino)-9-fluorenone in the Nematic State

, Bull. Chem. Soc. Jpn, vol.56, pp.3830-3832, 1983.

F. Hardouin, G. Sigaud, M. F. Achard, and H. Gasparoux, Experimental tricritical point nematic-smectic A in a two components-system, Solid State Commun, vol.22, pp.343-345, 1977.

Y. Hu, K. Miao, L. Xu, X. Miao, and W. Deng, One Chain Fixed, One Chain Modified by ?C 5 H 10 ?: An Efficient Strategy on Fabricating Structural Diversity for 2D Self-Assembly

, J. Phys. Chem. C, vol.121, pp.21449-21460, 2017.

Y. Hu, K. Miao, L. Xu, B. Zha, M. Long et al., Two side chains, three supramolecules: exploration of fluorenone derivatives towards crystal engineering, Phys. Chem. Chem. Phys, vol.19, pp.19205-19216, 2017.

Z. Tai, X. Qian, J. Zou, S. Xiao, and F. Zhang, Molecular assemblies of diazafluorenone

. Schiff-base-amphiphiles, D. Ii-;-tzalis, Y. Tor, S. Failla, and J. S. Siegel, Simple one-step synthesis of 3-bromo-and 3,8-dibromo-1,10-phenanthroline: Fundamental building blocks in the design of metal chelates, Tetrahedron Lett, vol.36, issue.45, pp.3489-3490, 1995.

K. Manna, T. Zhang, F. X. Greene, and W. Lin, Bipyridine-and Phenanthroline-Based Metal-Organic Frameworks for Highly Efficient and Tandem Catalytic Organic Transformations via Directed C-H Activation, J. Am. Chem. Soc, vol.137, pp.2665-2673, 2015.

Y. Saitoh, T. Koizumi, K. Osakada, and T. Yamamoto, Preparation of symmetric dibromides of 1,10-phenanthroline, Can. J. Chem, vol.75, pp.1336-1339, 1997.

T. Wöhrle, S. J. Beardsworth, C. Schilling, A. Baro, F. Giesselmann et al.,

, Columnar propeller-like 1,3,5-triphenylbenzenes: the missing link of shape-persistent hekates, Soft Matter, vol.12, pp.3730-3736, 2016.

J. Shi, Y. Wang, M. Xiao, P. Zhong, Y. Liu et al., Luminescent metallomesogens based on platinum complex containing triphenylene unit, Tetrahedron, vol.71, pp.463-469, 2015.

T. Wöhrle, J. Kirres, M. Kaller, M. Mansueto, S. Tussetschläger et al., Pushing Steric Bias in the Scholl Reaction to Access Liquid Crystalline Crown Ethers, J. Org. Chem, vol.79, pp.10143-10152, 2014.

K. Tanabe, Y. Suzui, M. Hasegawa, and T. Kato, Full-Color Tunable Photoluminescent

, Ionic Liquid Crystals Based on Tripodal Pyridinium, Pyrimidinium, and Quinolinium Salts, J. Am. Chem. Soc, vol.134, pp.5652-5661, 2012.

Y. Wang, Y. Liu, J. Luo, H. Qi, X. Li et al., Metallomesogens based on platinum(II) complexes: synthesis, luminescence and polarized emission, Dalton Trans, vol.40, pp.5046-5051, 2011.

T. Yasuda, T. Shimizu, F. Liu, G. Ungar, and T. Kato, Electro-Functional Octupolar ?-Conjugated Columnar Liquid Crystals, J. Am. Chem. Soc, vol.133, pp.13437-13444, 2011.

B. Zhao, B. Liu, R. Q. Peng, K. Zhang, K. A. Lim et al.,

C. Chi and J. Wu, New Discotic Mesogens Based on Triphenylene-Fused Triazatruxenes: Synthesis, Physical Properties, and Self-Assembly, Chem. Mater, vol.22, pp.435-449, 2010.

W. Huang, L. Su, and Z. Bo, Hyperbranched Polymers with a Degree of Branching of 100% Prepared by Catalyst Transfer Suzuki?Miyaura Polycondensation, J. Am. Chem. Soc, vol.131, pp.10348-10349, 2009.

I. Sánchez, C. Núñez, J. A. Campo, M. R. Torres, M. Cano et al., Polycatenar unsymmetrical ?-diketonate ligands as a useful tool to induce columnar mesomorphism on highly luminescent boron difluoride complexes, J. Mater. Chem. C, vol.2, pp.9653-9665, 2014.

B. Wei, S. Tan, T. Liang, S. Cao, and Y. Wu, Synthesis, structural and electrochemical characterization of benzimidazole compounds exhibiting a smectic C liquid crystal phase, J. Mol. Struct, vol.1133, pp.392-397, 2017.

J. T. Mills, H. F. Gleeson, J. W. Goodby, M. Hird, A. Seed et al., X-ray and optical studies of the tilted phases of materials exhibiting antiferroelectric, ferrielectric and ferroelectric mesophases, J. Mater. Chem, vol.8, pp.2385-2390, 1998.

V. Novotná, V. Hamplová, M. Ka?par, N. Podoliak, A. Bubnov et al., Giesselmann, F. The effect of lactate unit number in compounds with azo group in the molecular core, Liq. Cryst, vol.38, pp.649-655, 2011.

M. Rössle, R. Zentel, J. P. Lagerwall, and F. Giesselmann, Ferroelectric polysiloxane liquid crystals with 'de Vries'-type smectic A*-smectic C* transitions, Liq. Cryst, vol.31, pp.883-887, 2004.

S. Ovalle, E. Westphal, and H. Gallardo, Ionic liquid crystals with 1,2,3-triazole + tolane core and a pendant imidazolium unit: mesophases from one-to three-dimensional molecular organisation by the variation of alkoxy chains number and spacer length, Liq. Cryst, vol.45, pp.942-952, 2018.

N. Godbert, A. Crispini, M. Ghedini, M. Carini, F. Chiaravalloti et al., LCDiXRay: a user-friendly program for powder diffraction indexing of columnar liquid crystals, J. Appl. Cryst, vol.47, pp.668-679, 2014.

T. Shimogaki, S. Dei, K. Ohta, and A. Matsumoto, Columnar mesophases constructed by hierarchical self-organization of rod-like diacetylene molecules, J. Mater. Chem, vol.21, pp.10730-10737, 2011.

S. Wu and H. Chen, Self-assembling behavior of binary mixture of hexa-perihexabenzocoronene derivatives with different molecular symmetry, Tetrahedron, vol.75, pp.220-229, 2019.

K. Bader, M. M. Neidhardt, T. Wöhrle, R. Forschner, A. Baro et al.,

S. Laschat, Amino acid/crown ether hybrid materials: how charge affects liquid crystalline self-assembly, Soft Matter, vol.13, pp.8379-8391, 2017.

K. Li and C. K. Lai, Phase crossover in columnar tris-(1,3,4-oxadiazoles) with pendant quinoxalines, Tetrahedron, vol.72, pp.7579-7588, 2016.

E. Girotto, M. Ferreira, P. Sarkar, A. Bentaleb, E. A. Hillard et al., Shaped Column-Forming Mesogens with Substituents on One Side Only
URL : https://hal.archives-ouvertes.fr/hal-01153866

, Chem. Eur. J, vol.21, pp.7603-7610, 2015.

V. Percec, M. R. Imam, M. Peterca, W. Cho, and P. A. Heiney, Self-Assembling Dendronized Dendrimers, Isr. J. Chem, vol.49, pp.55-70, 2009.

J. Barberá, M. A. Esteruelas, A. M. Levelut, L. A. Oro, J. L. Serrano et al., Rectangular and Hexagonal Columnar Mesophases in Dinuclear Rhodium(II) (Alkyloxy)benzoate Complexes, Inorg. Chem, vol.31, pp.732-737, 1992.

S. K. Pathak, B. Pradhan, M. Gupta, S. K. Pal, A. A. Sudhakar et al., Room temperature columnar phase: Influence of 2-ethylhexane peripheral chain on the mesomorphism of polyalkynylbenzene-based disc-shaped molecules, Liq. Cryst, vol.38, issue.71, pp.1321-1329, 2011.

R. Kannan, T. Sen, R. Poupko, Z. Luz, H. Zimmermann et al., Dynamics and Ordering in the Columnar Mesophases of Octa-alkyloxy Orthocylophane: A Carbon-13 NMR Investigation, J. Phys. Chem. B, vol.107, issue.73, pp.3171-3182, 2003.

D. Ghose, T. R. Bose, C. D. Mukherjee, M. K. Roy, and M. Sana, A Molecular Mean Field Model for a Rectangular to Hexagonal Phase Transitionin Discotic Liquid Crystals

, Mol. Cryst. Liq. Cryst, vol.173, pp.17-29, 1989.

Y. F. Sun and J. Swift, Orientational order and phase transitions in columnar liquid crystals, Phys. Rev. A, vol.33, pp.2735-2739, 1986.

W. Haase, D. Kilian, M. A. Athanassopoulou, D. Knawby, T. M. Swager et al.,

S. , Enhanced conductivity and dielectric absorption in discotic liquid crystalline columnar phases of a vanadyl complex, Liq. Cryst, vol.29, pp.133-139, 2002.

M. Lehmann, C. Köhn, H. Meier, S. Renker, and A. Oehlhof, Supramolecular order of stilbenoid dendrons: importance of weak interactions, J. Mater. Chem, vol.16, pp.441-451, 2006.

V. Percec, C. M. Mitchell, W. Cho, S. Uchida, M. Glodde et al.,

Y. Liu, V. S. Balagurusamy, and P. A. Heiney, Designing Libraries of First Generation AB 3 and AB 2 Self-Assembling Dendrons via the Primary Structure Generated from Combinations of (AB) y ?AB 3 and (AB) y ?AB 2 Building Blocks, J. Am. Chem. Soc, vol.126, pp.6078-6094, 2004.

M. L. Nguyen, H. Kim, and B. Cho, Peripheral chain length-dependent complex phase behaviour in C 3 -symmetric hexa-alkylated liquid crystals, Liq. Cryst, vol.45, pp.1196-1209, 2018.

S. K. Pathak, S. Nath, R. K. Gupta, D. S. Rao, S. K. Prasad et al., Effect of regioisomerism on the self-assembly and photophysical behavior of 1,3,4-thiadiazole-based polycatenars, J. Mater. Chem. C, vol.3, pp.8166-8182, 2015.

B. N. Veerabhadraswamy, H. K. Dambal, D. S. Rao, and C. Yelamaggad, V. s-Triazine-Based Functional Discotic Liquid Crystals: Synthesis, Mesomorphism and Photoluminescence, ChemPhysChem, vol.17, pp.2225-2237, 2016.

J. Tang, R. Huang, H. Gao, X. Cheng, M. Prehm et al., Columnar mesophases of luminescent polycatenar liquid crystals incorporating a 1,3-substituted benzene ring interconnecting two 1,3,4-oxadiazoles, vol.2, pp.2842-2847, 2012.

B. Mu, K. Chen, J. Chen, J. Fang, and D. Chen, Toward well-organised ionic discotic liquid crystals via versatile supramolecular approach, Liq. Cryst, vol.45, pp.1287-293, 2018.

J. Iehl, T. L. Nguyen, S. Frein, U. Hahn, J. Barberá et al.,

R. Deschenaux, Designing liquid-crystalline dendronised hexa-adducts of [60]fullerene via click chemistry, Liq. Cryst, vol.44, pp.1852-1860, 2017.
URL : https://hal.archives-ouvertes.fr/hal-02158277

E. Beltrán, J. L. Serrano, T. Sierra, and R. Giménez, Tris(triazolyl)triazine via ClickChemistry: A C 3 Electron-Deficient Core with Liquid Crystalline and Luminescent Properties, Org. Lett, vol.12, pp.1404-1407, 2010.

E. Beltrán, E. Cavero, J. Barberá, J. L. Serrano, A. Elduque et al.,

, Helical Columnar Mesophases and Luminescence of Chiral 1H-Pyrazoles

, Chem. Eur. J, vol.15, pp.9017-9023, 2009.

, Software Avogadro, Version 1.1.1, for details see

D. C. Lonie, T. Vandermeersch, E. Zurek, and G. R. Hutchison, Avogadro: an advanced semantic chemical editor, visualization, and analysis platform, J. Cheminf, vol.4, p.17, 2012.

G. Zou, K. Luo, L. Zhao, H. Ni, H. Wang et al., Ortho-platinated metallomesogens based on rod mesogenic unit of 2-phenylpyridine derivatives: synthesis, high linearly polarised and phase-state-dependent luminescence, Liq. Cryst, vol.45, pp.593-606, 2018.

C. M. Alves, S. Naik, P. J. Coutinho, and M. S. Goncalves, Novel long alkyl side chain benzo[a]phenoxazinium chlorides: synthesis, photophysical behaviour and DNA interaction, Tetrahedron, vol.65, pp.10441-10452, 2009.

P. W. Atkins, J. P. De-paula, and . Chemie, 91) It should be noted that solid state photoluminescence spectra were determined after temperature equilibration, 2013.

S. Garoff and R. B. Meyer, Electroclinic effect at the A-C phase change in a chiral smectic liquid crysta, Phys. Rev. A: At., Mol., Opt. Phys, vol.19, pp.338-347, 1979.

S. Shibahara, Y. Takanishi, J. Yamamoto, T. Ogasawara, K. Ishikawa et al., Observation of a pretransitional effect near a virtual smectic-A-smectic-C* transition, Phys. Rev. E, vol.63, 2001.

A. Qi and B. Tang, Z. Aggregation-Induced Emission: Fundamentals and Applications, vol.1, 2013.

Z. He, C. Ke, and B. Z. Tang, Journey of Aggregation-Induced Emission Research, ACS Omega, vol.3, pp.3267-3277, 2018.

, We are grateful to one reviewer pointing this out

D. F. Ester and V. E. Williams, Molecular symmetry effects on the stability of highly ordered smectic phases, Soft Matter, 2018.