CN105647220A - 一种D-π-A结构硼氟染料及制备方法和应用 - Google Patents
一种D-π-A结构硼氟染料及制备方法和应用 Download PDFInfo
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- LIQLLTGUOSHGKY-UHFFFAOYSA-N [B].[F] Chemical compound [B].[F] LIQLLTGUOSHGKY-UHFFFAOYSA-N 0.000 title abstract description 5
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000975 dye Substances 0.000 claims abstract description 26
- 239000007787 solid Substances 0.000 claims abstract description 17
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- 239000007850 fluorescent dye Substances 0.000 claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims abstract description 13
- WLNIBLNYTGOTBN-UHFFFAOYSA-N 8-(1h-benzimidazol-2-yl)-2-methylquinoline Chemical compound C1=CC=C2NC(C3=CC=CC4=CC=C(N=C43)C)=NC2=C1 WLNIBLNYTGOTBN-UHFFFAOYSA-N 0.000 claims abstract description 9
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 20
- 239000002904 solvent Substances 0.000 claims description 18
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
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- OKZIUSOJQLYFSE-UHFFFAOYSA-N difluoroboron Chemical compound F[B]F OKZIUSOJQLYFSE-UHFFFAOYSA-N 0.000 claims description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
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- UESSERYYFWCTBU-UHFFFAOYSA-N 4-(n-phenylanilino)benzaldehyde Chemical compound C1=CC(C=O)=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 UESSERYYFWCTBU-UHFFFAOYSA-N 0.000 abstract 1
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- 229910015900 BF3 Inorganic materials 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical group C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
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- 150000003851 azoles Chemical class 0.000 description 2
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 2
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- XJGMSBDCAXOWTR-UHFFFAOYSA-N C(C1)C=CC=C1N(c1ccccc1)c1ccccc1 Chemical compound C(C1)C=CC=C1N(c1ccccc1)c1ccccc1 XJGMSBDCAXOWTR-UHFFFAOYSA-N 0.000 description 1
- ZGNCKIDXVHSMJL-UHFFFAOYSA-N Cc(ccc1ccc2)nc1c2C(O)=O Chemical compound Cc(ccc1ccc2)nc1c2C(O)=O ZGNCKIDXVHSMJL-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
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- 238000006000 Knoevenagel condensation reaction Methods 0.000 description 1
- RWZYAGGXGHYGMB-UHFFFAOYSA-N Nc1ccccc1C(O)=O Chemical compound Nc1ccccc1C(O)=O RWZYAGGXGHYGMB-UHFFFAOYSA-N 0.000 description 1
- AJEIPRZEKPBQAE-UHFFFAOYSA-N O=CC1C=CC(N(c2ccccc2)c2ccccc2)=CC1 Chemical compound O=CC1C=CC(N(c2ccccc2)c2ccccc2)=CC1 AJEIPRZEKPBQAE-UHFFFAOYSA-N 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
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- BFMYDTVEBKDAKJ-UHFFFAOYSA-L disodium;(2',7'-dibromo-3',6'-dioxido-3-oxospiro[2-benzofuran-1,9'-xanthene]-4'-yl)mercury;hydrate Chemical compound O.[Na+].[Na+].O1C(=O)C2=CC=CC=C2C21C1=CC(Br)=C([O-])C([Hg])=C1OC1=C2C=C(Br)C([O-])=C1 BFMYDTVEBKDAKJ-UHFFFAOYSA-L 0.000 description 1
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- 238000002844 melting Methods 0.000 description 1
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- 229910021645 metal ion Inorganic materials 0.000 description 1
- 125000001434 methanylylidene group Chemical group [H]C#[*] 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 150000003233 pyrroles Chemical class 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
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- 238000010992 reflux Methods 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- 229940043267 rhodamine b Drugs 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- CMXPERZAMAQXSF-UHFFFAOYSA-M sodium;1,4-bis(2-ethylhexoxy)-1,4-dioxobutane-2-sulfonate;1,8-dihydroxyanthracene-9,10-dione Chemical compound [Na+].O=C1C2=CC=CC(O)=C2C(=O)C2=C1C=CC=C2O.CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC CMXPERZAMAQXSF-UHFFFAOYSA-M 0.000 description 1
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Abstract
本发明提供一种D-π-A结构硼氟染料,具体化合物为BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉,本发明以2-甲基-8-(2-苯并咪唑基)喹啉和4-甲酰基三苯胺为反应物,合成了新型硼氟荧光染料,并通过核磁共振氢谱,碳谱,质谱进行了结构鉴定。该化合物的紫外-可见吸收及荧光光谱测试表明:该染料在紫外可见区有很强的吸收,在溶液中及固态下均有荧光,并且有较高的荧光量子产率和大的斯托克斯位移(Stokes?shift)。在非极性溶剂(甲苯)中,荧光量子产率达0.991,Stokes?shift为97nm;固态下呈现较强的荧光,Stokes位移为178nm。
Description
技术领域
本发明涉及一种荧光染料,该荧光染料为D-π-A结构硼氟染料,具体为BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉。
背景技术
氟化硼络合二吡咯甲川(4,4-Difluoro-4-bora-dipyrromethen,BODIPY)类荧光染料因其自身优良性质而被广泛应用于生物标记、荧光分析检测、化学传感器、太阳能敏化电池等领域。然而在固态下易团聚和Stokes位移较小等限制了BODIPY更广泛的应用。近来的研究表明,用吡啶、咪唑取代吡咯的硼氟染料与BODIPY一样具有较高的荧光量子产率和摩尔吸光系数,但是可以在分子间形成非共价键作用力,从而固态下呈现较强的荧光,并且具有较大的Stokes位移。
本发明在前期的基础上改进了BODIPY的基本骨架结构,用喹啉、苯并咪唑取代吡咯,并引入三苯胺。三苯胺以氮为中心,具有强的给电子能力,电子通过π键转移到硼缺电子中心,促进了分子内电荷转移,增大Stokes位移,三苯胺和硼氟化合物以π键共轭体系相连,形成了具有典型D-π-A结构的分子。同时三个苯环呈近似螺旋桨的结构,空间位阻较大,可以很大程度上的抑制分子间的平面π-π堆积,使染料固态下不易团聚,同时增大了化合物的溶解性;烯键的引入,增大了染料的共轭体系,使得荧光发射波长红移。
发明内容
本发明设计的骨架结构中有甲基反应位点,通过Knoevenagel反应与4-甲酰基三苯胺缩合得到配体与BF3·Et2O配位,获得了新型硼氟荧光染料,该燃料的化合物为BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉,具体结构式为:
所述的D-π-A结构硼氟染料的制备方法,包括如下步骤:
(1)向容器中依次加入化合物2-甲基-8-(2-苯并咪唑基)喹啉,4-甲酰基三苯胺,正丁醇,哌啶,冰乙酸,回流8-10h,冷却,有黄色固体析出,抽滤得固体,用乙醇洗涤滤饼3次,得产物2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉;
(2)向容器中依次加入2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉,氯仿,三乙胺,氮气保护下,在0℃下滴加三氟化硼乙醚,回流6-8h,加水淬灭,用氯仿萃取3次,合并有机相,干燥,柱层析,得目标产物BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉。
上述步骤(1)中,2-甲基-8-(2-苯并咪唑基)喹啉与4-甲酰基三苯胺的摩尔比为1.8-2.0:2.5-3.5。
本发明专利中将D-π-A结构硼氟染料在荧光染料上的应用。具体为该荧光染料具体作为活体细胞中荧光追踪剂中的应用。或应用于金属离子、阴离子及不同性质溶剂的检测应用。或该荧光染料具体作为有机发光二极管中的应用,该荧光染料为固态。
本发明的染料的溶剂化效应明显,随着溶剂极性的增强,分子内电荷传递更加有效,从而导致发射峰向长波长方向移动,Stokes位移增大,该长波长(λem≥600nm)染料因其优良的荧光性能可应用于活体细胞中的荧光追踪;该染料固体下表现出较强的荧光,并且具有较大的Stokes位移,可应用于有机发光二极管等领域。
附图说明
图1.BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉在不同溶剂中的紫外-可见吸收光谱(10-5mol/L,Ex:420nm)。
图2.BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉在不同溶剂中的荧光发射光谱(10-5mol/L,Ex:420nm)。
图3.BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉在不同浓度下(氯仿)的荧光发射光谱(10-5mol/L,Ex:420nm)。
图4.BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉在固态膜紫外吸收光谱和荧光发射光谱(Ex:490nm)。
具体实施方式
仪器与试剂
400MHz核磁共振仪(Bruker,瑞士),以CDCl3为溶剂,1HNMR以TMS为内标;13CNMR以CDCl3为内标;液质联用仪(Agilent6120,美国);F-4500荧光光谱仪(Hitachi,日本);U-3010紫外-可见分光光度仪(Hitachi,日本);WRS-1A型熔点仪(上海索光光电技术有限公司),温度计未经校正。
BF3·Et2O(AR,Aldrich公司),其余试剂为国产分析纯。
合成方法
2-甲基-8-(2-苯并咪唑基)喹啉(4)的合成
2-甲基-8-(2-苯并咪唑基)喹啉的合成按文献进行(PolanskiJ,ZouhiriF,JeansonL,etal.[J].JMedChem,2002,45(21):4647-4654)。熔点173.5~174.3℃。1HNMR(400MHz,CDCl3):δ:13.72(br,1H),9.11(d,1H),8.16(d,1H),7.86(d,2H),7.65(t,2H),7.39(d,1H),7.29-7.31(m,2H),2.91(s,3H)。
4-甲酰基三苯胺(3)的合成
4-甲酰基三苯胺的合成按文献进行(WushengR,HaoZ,QingB,etal.[J].DyesPigments,2014,100:127-134)。熔点:122.1~122.9℃。
2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉(2)的合成
向50mL两口瓶中依次加入0.51g(1.9mmol)化合物4,0.79g(2.9mmol)4-甲酰基三苯胺,10mL正丁醇,0.57mL(4.8mmol)哌啶,0.33mL(4.8mmol)冰乙酸,回流8h,冷却,有黄色固体析出,抽滤得固体,用乙醇洗涤滤饼3次,得产物0.83g,产率:82.1%。1HNMR(400MHz,CDCl3):δ:13.85(s,1H),9.12(d,1H),8.21(d,1H),7.86(d,2H),7.72-7.55(m,6H),7.35-7.29(m,7H),7.18-7.08(m,8H);API-ES-MS,m/z(%):514.6(100)[M+H+]
BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉(1)的合成
向50mL两口瓶中依次加入0.52g(1.0mmol)化合物2,10mL氯仿,1.35mL三乙胺,氮气保护下,在0℃下缓慢滴加0.98mL三氟化硼乙醚,回流6h,加水淬灭,用氯仿萃取3次,合并有机相,干燥,柱层析,得目标产物0.24g,产率:42.3%。1HNMR(400MHz,CDCl3):δ:9.10(s,1H),8.45-8.38(m,2H),8.18(d,1H),7.92-7.89(m,2H),7.87-7.84(m,1H),7.78(t,1H),7.67-7.60(m,3H),7.36-7.30(m,6H),7.20-7.13(m,6H),7.09(d,2H);13CNMR(100MHz,CDCl3):δ:158.6,150.7,146.5,146.4,143.8,142.6,137.0,136.2,131.2,130.6,130.1,129.6,129.4,127.9,127.8,127.2,125.8,125.2,124.6,123.8,123.6,123.4,122.1,120.9,120.8,120.0,119.9,118.0,114.2;API-ES-MS,m/z(%):562.5(100)[M+H+]。
紫外-可见光和荧光谱性能测试
称取一定质量的染料加入10mL比色管中,配置成浓度为1.0×10-2mol/L的氯仿溶液。分别取10μL溶液加入8个10mL比色管中,用不同溶剂定容至10mL配成浓度为1.0×10-5mol/L溶液;用同样的方法配置浓度为1.0×10-6mol/L溶液测定该化合物的荧光量子产率,以罗丹明B为标准参照物;滴加1滴10-2mol/L浓溶液于干净的石英片上,溶剂挥发后形成固态薄膜。利用紫外和荧光光谱仪分别检测染料的紫外-可见光和荧光光谱性能。
染料在不同溶剂中的光谱性能
表1染料在不同溶剂中的光谱数据
从图1中可知,BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉(以下简称化合物1)的紫外吸收光谱除在乙醇和甲醇中变化明显外,在其它溶剂中总体上变化不大。非极性溶剂中,在乙酸乙酯中的最大吸收波长为489nm,在氯仿中最大吸收波长为514nm,总体上变化不大。而在乙醇和甲醇中发生了明显的紫外吸收峰蓝移,与在氯仿中最大吸收波长514nm相比,分别蓝移了95nm和99nm,该现象可能是质子性溶剂与化合物1形成了分子间氢键有关。从化合物1在不同溶剂中荧光发射光谱可知,化合物的最大发射波长随溶剂极性增大而有明显的红移,但在偶极溶剂(二甲基甲酰胺)和质子溶剂(乙醇和甲醇)中的荧光光谱性质不适用于此规律。如图2所示,该化合物的最大发射波长在正己烷(561nm)中最小;在乙酸乙酯(642nm)中最大,红移了81nm。表明化合物1的激发态存在着强烈的分子内电荷转移,从而引起分子严重极化;发射峰红移,可能是电荷转移态被溶剂稳定到更低的能级所致;相反,在基态下,由于化合物1分子内电荷转移较弱,其紫外吸收光谱就不随溶剂极性变化而明显变化。而在甲醇和乙醇中,溶剂和化合物1的氢键作用会影响基态和激发态的稳定,造成电荷的分离程度增大,因而能级升高,导致光谱蓝移。
图3为化合物1在氯仿溶液中浓度依赖荧光发射光谱,随着浓度的增大,发射峰逐渐红移,从632nm红移到661nm,红移了29nm;随着浓度增大,荧光强度增大,但增大到10-3M时,荧光强度下降。可能是随着浓度增大,化合物1在氯仿中形成聚集体;溶质分子间碰撞几率增大,从而造成能量损失。
图4固态膜光谱中,染料最大发射峰在728nm处,相对于溶剂中的最大发射峰有较大的红移;在550nm处有最大吸收峰,相对于溶剂中最大吸收波长也有较大红移。该染料在固态下Stokes位移为178nm,在固态下表现出很强的荧光性能。传统的BODIPY染料由于分子结构的高度平面性,在固态下易团聚从而导致荧光淬灭。可能由于该化合物中引入了空间位阻较大的三苯胺,使得分子呈现非平面的堆积,所以该染料在固态下呈现很强的荧光,并具有较大的Stokes位移。
Claims (10)
1.一种D-π-A结构硼氟染料,其特征在于,该染料为BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉,具体结构式为:
2.权利要求1所述的D-π-A结构硼氟染料的制备方法,其特征在于,包括如下步骤:
(1)向容器中依次加入化合物2-甲基-8-(2-苯并咪唑基)喹啉,4-甲酰基三苯胺,乙醇,哌啶,乙酸,回流8-10h,冷却,有黄色固体析出,抽滤得固体,用乙醇洗涤滤饼3次,得产物2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉;
(2)向容器中依次加入2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉,氯仿,三乙胺,氮气保护下,在0℃下滴加三氟化硼乙醚,回流6-8h,加水淬灭,用氯仿萃取3次,合并有机相,干燥,柱层析,得目标产物BF2-2-(4-三苯胺乙烯基)-8-(2-苯并咪唑基)喹啉。
3.权利要求2所述的D-π-A结构硼氟染料的制备方法,其特征在于,2-甲基-8-(2-苯并咪唑基)喹啉与4-甲酰基三苯胺的摩尔比为1.8-2.0:2.5-3.5。
4.权利要求1-3任一项所述的D-π-A结构硼氟染料在荧光染料上的应用。
5.权利要求4所述的应用,该荧光染料具体作为活体细胞中荧光追踪剂中的应用。
6.权利要求4所述的应用,该荧光染料在阳离子的检测上的应用。
7.权利要求4所述的应用,该荧光染料在阴离子的检测上的应用。
8.权利要求4所述的应用,该荧光染料在质子性溶剂的检测上的应用。
9.权利要求4所述的应用,该荧光染料具体作为有机发光二极管中的应用。
10.权利要求6所述的应用,该荧光染料为固态。
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