Growth and characterization of organic material 2-bromobenzyl alcohol single crystal by vertical Bridgman technique

Solanki, S. K.; Rajesh, N.P.; Suthan, T.

doi:10.1007/s10854-020-04949-5

Cited by 5 publications

(2 citation statements)

References 31 publications

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“…We have grown organic crystals using the vertical Bridgman technique: p -terphenyl (PTP), 5,12-dihydro-5,12-diazatetracene-doped p -terphenyl (DHDAT-PTP), 6,13-diazapentacene-doped p -terphenyl (DAP-PTP), 6,13-dihydro-6,13-diazapentacene-doped p -terphenyl (DHDAP-PTP), phenazine-doped p -terphenyl (PNZ-PTP), 5,10-dihydrophenazine-doped p -terphenyl (DHPNZ-PTP), and 5,12-diazatetracene-doped p -terphenyl (DAT-PTP). Before crystal growth began, the ampules were cleaned three times with anhydrous ethanol, isopropyl alcohol, and deionized water and then dried in an oven at 120 °C for 24 h. It is experimentally observed that organic materials with low melting points may sublimate and escape quickly, resulting in tiny crystals and an enormous waste of raw materials . Therefore, we adopted a vacuum sealing strategy to fill the mixed powder of purified p -terphenyl and nitrogen-containing biphenyl (0.1 wt %) into an ampule and sealed it at 10 –2 Pa. During the crystal growth process, because the furnace moves vertically upward, the temperature at the fixed position of the ampule continues to decrease.…”

Section: Methodsmentioning

confidence: 99%

“…Before crystal growth began, the ampules were cleaned three times with anhydrous ethanol, isopropyl alcohol, and deionized water and then dried in an oven at 120 °C for 24 h. It is experimentally observed that organic materials with low melting points may sublimate and escape quickly, resulting in tiny crystals and an enormous waste of raw materials. 42 Therefore, we adopted a vacuum sealing strategy to fill the mixed powder of purified p-terphenyl and nitrogen-containing biphenyl (0.1 wt %) into an ampule and sealed it at 10 −2 Pa. During the crystal growth process, because the furnace moves vertically upward, the temperature at the fixed position of the ampule continues to decrease. Initially, place the ampule in the high-temperature zone (230 °C) for 12 h to ensure uniform melting of the material.…”

Section: Growth Of Nitrogenous Biphenyl-doped P-terphenylmentioning

confidence: 99%

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Large-Sized Nitrogen-Containing Biphenyl-Doped p-Terphenyl Crystals with Tunable Luminescence for Organic Scintillators

Han,

Yang,

Zhu

et al. 2024

Crystal Growth & Design

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Large-sized organic crystals used as scintillators have great potential for X-ray detection and medical diagnosis due to their excellent environmental stability, extremely short fluorescence decay time, and low radiation detection limit. However, poor crystallinity, slow crystal growth speed, and lack of high-quality seed crystals make it challenging to obtain large sizes with high quality. Here, the vertical Bridgman method was introduced to grow organic doped crystals where p-terphenyl was used as the host and six nitrogenous biphenyls were adopted as the dopants. Nitrogen-containing biphenyl-doped p-terphenyl crystals were cultured to get the dimension of Φ 12 mm × 40 mm. Fluorescence spectra show that dopant molecules with molecular packing structures similar to those of the host molecule can achieve successful doping with the host molecule. Under X-ray excitation, the organic doped crystals exhibit tunable luminescence characteristics from blue light (465 nm) to green light (498 nm). Our research provides a reference for achieving successful doping of host and dopant molecules through molecular design.

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Section: Methodsmentioning

confidence: 99%

Section: Growth Of Nitrogenous Biphenyl-doped P-terphenylmentioning

confidence: 99%